William Jo Professor
Department of Physics
Professor William Jo works for Department of Physics. He majors in applied physics and nano-physics. He got B.S., M.S., and Ph D. from Seoul National University. He worked in LG Electronics Research Center and Stanford University. He served for the Korean Physical Society as a conference secretary, general secretary, policy chair (vice-president), and chair of applied physics division. His current research topics are compound semiconductor solar cells, organic-inorganic perovskite solar cells, 2-D materials and functional oxides.
- Vice President for Admissions/Director, New and Renewable Energy Research Center
- Science Building A #A521
- 02-3277-4066
Research Record
- Advance Supply of Ag and Ga-Se for Increased Backside Ga and Enhanced Cu(In,Ga)Se2 Solar Cell Efficiency ACS Applied Energy Materials, 2023, v.6 no.24, 12180-12189
- Anisotropic Charge Transport in Cu(In,Ga)Se-2 by Heavy Alkali Postdeposition Treatment for Reducing Cell-to-Module Efficiency Loss in Monolithically Integrated Photovoltaic Modules SOLAR RRL, 2023, v.7 no.10, 0
- Improving open-circuit voltage deficit by interface passivation via Li treatment in Cu2ZnSn(S,Se)4 solar cells Journal of Materials Chemistry A, 2023, v.11 no.46, 25555-25562
- Photo-excited carrier transport and secondary phases of Na-engineered kesterite flexible thin films Solar Energy Materials and Solar Cells, 2023, v.250, 112091
- Reforming material chemistry of CIGS solar cells via a precise Ag doping strategy JOURNAL OF MATERIALS CHEMISTRY A, 2023, v.11 no.36, 19546-19555
- Wide-bandgap perovskites for multijunction solar cells: improvement of crystalline quality of Cs0.1FA0.9PbI1.4Br1.6 by using lead thiocyanate Journal of Materials Chemistry A, 2023, v.11 no.19, 10254-10266
- Enhanced Light Absorption and Efficient Carrier Collection in MoS2 Monolayers on Au Nanopillars Nanomaterials, 2022, v.12 no.9, 1567
- Flexible kesterite thin-film solar cells under stress npj Flexible Electronics, 2022, v.6 no.1, 91
- Grain boundary passivation via balancing feedback of hole barrier modulation in HfO2-x for nanoscale flexible electronics Nano Convergence, 2022, v.9 no.1, 43
- Halide perovskite single crystals: growth, characterization, and stability for optoelectronic applications Nanoscale, 2022, v.14 no.26, 9248-9277
- Improvement of Open-Circuit Voltage Deficit via Pre-Treated NH4+ Ion Modification of Interface between SnO2 and Perovskite Solar Cells SMALL, 2022, v.18 no.44, 2204173
- Parallel Alignment of Methylammonium Cations in an Orthorhombic CH3NH3PbCl3Single Crystal Observed by Polarized Micro-Raman Scattering Spectroscopy Chemistry of Materials, 2022, v.34 no.7, 2972-2980
- Tailored Band Structure of Cu(In,Ga)Se-2 Thin-Film Heterojunction Solar Cells: Depth Profiling of Defects and the Work Function ACS APPLIED MATERIALS & INTERFACES, 2022, v.14 no.30, 34697-34705
- UV and Visible Photodetectors of MAPbBr3 and MAPbCl3 Perovskite Single Crystals via Single Photocarrier Transport Design Advanced Optical Materials, 2022, v.10 no.7, 2102175
- Understanding the Space-Charge Layer in SnO2 for Enhanced Electron Extraction in Hybrid Perovskite Solar Cells ACS APPLIED MATERIALS & INTERFACES, 2022, v.14 no.42, 48229-48239
- Chemical tailoring of sodium content for optimization of interfacial band bending and alignment in flexible kesterite solar cells Solar Energy Materials and Solar Cells, 2021, v.230, 111243
- Chlorine-passivation of ozone-treated SnO2 thin films: Occurrence of oxygen vacancies to manipulate conducting states and bipolarities in resistive switching Applied Surface Science, 2021, v.555, 149625
- Exotic optoelectronic behaviors in CH3NH3PbCl3perovskite single crystals: Co-existence of free and bound excitons with structural phase transitions Applied Physics Letters, 2021, v.118 no.14, 143301
- High speed growth of MAPbBr3single crystals: Via low-temperature inverting solubility: Enhancement of mobility and trap density for photodetector applications Nanoscale, 2021, v.13 no.17, 8275-8282
- Photo-induced defects in MAPbBr(3) single crystals JOURNAL OF PHYSICS-ENERGY, 2021, v.3 no.4, 44005
- Photon-induced defects and dynamics of photogenerated carriers in Cu(In,Ga)Se-2 thin film solar cells SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2021, v.220, 110860
- Reduced extrinsic recombination process in anatase and rutile TiO2 epitaxial thin films for efficient electron transport layers Scientific Reports, 2021, v.11 no.1, 6810
- Sodium Effects on the Diffusion, Phase, and Defect Characteristics of Kesterite Solar Cells and Flexible Cu2ZnSn(S,Se)4 with Greater than 11% Efficiency Advanced Functional Materials, 2021, v.31 no.29, 2102238
- Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu2ZnSn(S,Se)4 solar cells Progress in Photovoltaics: Research and Applications, 2020, v.28 no.5, 382-392
- Impact of Na Doping on the Carrier Transport Path in Polycrystalline Flexible Cu2ZnSn(S,Se)4 Solar Cells Advanced Science, 2020, v.7 no.21, 1903085
- Low Voltage and Ferroelectric 2D Electron Devices Using Lead-Free BaxSr1-xTiO3 and MoS2 Channel Advanced Functional Materials, 2020, v.30 no.7, 1908210
- Mechanisms of extrinsic alkali incorporation in GIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses NANO ENERGY, 2020, v.67, 104201
- Photo-response in 2D metal chalcogenide-ferroelectric oxide heterostructure controlled by spontaneous polarization Journal of Materials Chemistry C, 2020, v.8 no.11, 3724-3729
- Point defects, compositional fluctuations, and secondary phases in non-stoichiometric kesterites JOURNAL OF PHYSICS-ENERGY, 2020, v.2 no.1, 12002
- Raman Scattering Studies of the Structural Phase Transitions in Single-Crystalline CH3NH3PbCl3 JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2020, v.11 no.10, 3773-3781
- Sodium-assisted passivation of grain boundaries and defects in Cu2ZnSnSe4 thin films PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2020, v.22 no.14, 7597-7605
- Unraveling interface characteristics of Zn(O,S)/Cu(In,Ga)Se-2 at nanoscale: Enhanced hole transport by tuning band offsets APPLIED SURFACE SCIENCE, 2020, v.509, 144782
- A simple and robust route toward flexible CIGS photovoltaic devices on polymer substrates: Atomic level microstructural analysis and local opto-electronic investigation SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2019, v.195, 280-290
- Effects of Organic Cations on Carrier Transport at the Interface between Perovskites and Electron Transport Layers in (FA,MA)SnI3 Solar Cells JOURNAL OF PHYSICAL CHEMISTRY C, 2019, v.123 no.51, 30833-30841
- Enhanced carrier transport over grain boundaries in lead-free CH3NH3Sn(I1-xBrx)(3) (0 <= x <= 1) perovskite solar cells NANOTECHNOLOGY, 2019, v.30 no.31, 314005
- Phase formation and local charge transport of lead-free CH3NH3Sn(I1-xBrx)(3) (0 <= x <= 1) perovskite solar cells fabricated by solvent optimization SOLAR ENERGY, 2019, v.186, 136-144
- Reconfigurable Dipole-Induced Resistive Switching of MoS2 Thin Layers on Nb:SrTiO3 ACS APPLIED MATERIALS & INTERFACES, 2019, v.11 no.49, 46344-46349
- The characteristics of Cu(In, Ga)Se 2 thin-film solar cells by bandgap grading Journal of Industrial and Engineering Chemistry, 2019, v.76, 437-442
- Adjusting the Anisotropy of 1D Sb2Se3 Nanostructures for Highly Efficient Photoelectrochemical Water Splitting ADVANCED ENERGY MATERIALS, 2018, v.8 no.14
- Enhanced electrical properties of Li-doped NiOx hole extraction layer in p-i-n type perovskite solar cells CURRENT APPLIED PHYSICS, 2018, v.18, S55-S59
- High photo-conversion efficiency Cu2ZnSn(S,Se)(4) thin-film solar cells prepared by compound-precursors and metal-precursors SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2018, v.183, 129-136
- Low-temperature growth and electronic structures of ambipolar Yb-doped zinc tin oxide transparent thin films Applied Surface Science, 2018, v.441, 49-54
- Role of Na in solution-processed CuInSe2 (CISe) devices: A different story for improving efficiency NANO ENERGY, 2018, v.48, 401-412
- Single Phase Formation of SnS Competing with SnS2 and Sn2S3 for Photovoltaic Applications: Optoelectronic Characteristics of Thin-Film Surfaces and Interfaces Journal of Physical Chemistry C, 2018, v.122 no.6, 3523-3532
- Surface potential mapping and n-type conductivity in organic-inorganic lead iodide crystals CRYSTENGCOMM, 2018, v.20 no.41, 6551-6556
- The alterations of carrier separation in kesterite solar cells NANO ENERGY, 2018, v.52, 38-53
- Virtual Out-of-Plane Piezoelectric Response in MoS2 Layers Controlled by Ferroelectric Polarization ACS APPLIED MATERIALS & INTERFACES, 2018, v.10 no.1, 1334-1339
- Control of work function of MoS2 with ferroelectric polarization in honeycomb-like heterostructure APPLIED PHYSICS LETTERS, 2017, v.110 no.19
- Memory effect behavior with respect to the crystal grain size in the organic-inorganic hybrid perovskite nonvolatile resistive random access memory Scientific Reports, 2017, v.7 no.1
- Optical and Scanning Probe Identification of Electronic Structure and Phases in CH3NH3PbBr3 Crystal Journal of Physical Chemistry C, 2017, v.121 no.40, 21930-21934
- Strain-induced non-linear optical characteristics of pyroelectric PbVO3 epitaxial thin films OPTICAL MATERIALS EXPRESS, 2017, v.7 no.1, 62-72
- Time-Resolved Pump-Probe Measurement of Optical Rotatory Dispersion in Chiral Metamaterial ADVANCED OPTICAL MATERIALS, 2017, v.5 no.15
- Trapping charges at grain boundaries and degradation of CH3NH3Pb(I1-xBrx)(3) perovskite solar cells NANOTECHNOLOGY, 2017, v.28 no.31
- Effects of Mo back-contact annealing on surface potential and carrier transport in Cu2ZnSnS4 thin film solar cells RSC ADVANCES, 2016, v.6 no.105, 103337-103345
- Effects of Postsynthesis Thermal Conditions on Methylammonium Lead Halide Perovskite: Band Bending at Grain Boundaries and Its Impacts on Solar Cell Performance JOURNAL OF PHYSICAL CHEMISTRY C, 2016, v.120 no.38, 21330-21335
- Hetero-epitaxial growth and large piezoelectric effects in (001) and (111) oriented PbTiO3-LaNiO3 multilayers JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2016, v.49 no.12
- High photo-conversion efficiency in double-graded Cu(In,Ga)(S,Se)2 thin film solar cells with two-step sulfurization post-treatment Progress in Photovoltaics: Research and Applications, 2016, v.25 no.2
- IBAD-MgO technology for coated conductors Progress in Superconductivity and Cryogenics (PSAC), 2016, v.18 no.3, 1-5
- Identification of marcasite in pyrite FeS2 thin films and the films' carrier transport characteristics RSC ADVANCES, 2016, v.6 no.84, 81394-81399
- Local transport properties of coated conductors by laser-scan imaging methods Progress in Superconductivity and Cryogenics (PSAC), 2016, v.18 no.2, 1-4
- Microstructural investigation of phases and pinning properties in MBa2Cu3O7-x (M Superconductor Science and Technology, 2016, v.29 no.3
- Effects of the compositional ratio distribution with sulfurization temperatures in the absorber layer on the defect and surface electrical characteristics of Cu2ZnSnS4 solar cells PROGRESS IN PHOTOVOLTAICS, 2015, v.23 no.12, 1771-1784
- Efficient Carrier Separation and Intriguing Switching of Bound Charges in Inorganic-Organic Lead Halide Solar Cells JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2015, v.6 no.12, 2355-2362
-
Enhancement of photo-conversion efficiency in Cu
2 ZnSn(S,Se)4 thin-film solar cells by control of ZnS precursor-layer thickness Progress in Photovoltaics: Research and Applications, 2015, v.24 no.3 - Improved dielectric properties of CaCu3Ti4O12 films with a CaTiO3 interlayer on Pt/TiO2/SiO2/Si substrates prepared by pulsed laser deposition Electronic Materials Letters, 2015, v.11 no.6, 1003-1011
- Incorporation of cobalt ions into magnetoelectric gallium ferrite epitaxial films: Tuning of conductivity and magnetization RSC Advances, 2015, v.5 no.43, 34265-34271
-
Influence of surface properties on the performance of Cu(In,Ga)(Se,S)
2 thin-film solar cells using Kelvin probe force microscopy RSC Advances, 2015, v.5 no.51, 40719-40725 - Influence of the ZnS precursor thickness on high efficiency Cu2ZnSn(S,Se)4 thin-film solar cells grown by stacked-sputtering and selenization process 2015 IEEE 42nd Photovoltaic Specialist Conference, PVSC 2015, 2015, 14-19 Jun 2015
-
Macroscopic and microscopic electrical properties of Cu(In,Ga)Se
2 thin-film solar cells with various Ga/(In + Ga) contents Current Applied Physics, 2015, v.15, S44-S50 - Nanostructured p-type CZTS thin films prepared by a facile solution process for 3D p-n junction solar cells NANOSCALE, 2015, v.7 no.25, 11182-11189
- Optical and surface probe investigation of secondary phases in Cu2ZnSnS4 films grown by electrochemical deposition SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2015, v.139, 10-18
- Raman scattering studies of Cu2ZnSnS4 thin films: Local distribution of the secondary phase Cu2−xS and the effect of KCN etching on Cu2−xS Journal of the Korean Physical Society, 2015, v.66 no.1, 117-122
- Raman scattering studies of the lattice dynamics in layered MoS2 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2015, v.66 no.10, 1575-1580
- Room-temperature polarization switching and antiferromagnetic coupling in epitaxial (Ga,Fe)2O3/SrRuO3 heterostructures Applied Physics Letters, 2015, v.106 no.14
- Spatial Investigation on Structural Properties of GdBa2Cu3O7-x Coated Conductors Grown on IBAD-MgO Based Stainless-Steel Substrates IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2015, v.25 no.3
- Ultra-large current transport in thick SmBa2Cu3O7-x films grown by reactive co-evaporation PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2015, v.513, 29-34
- Coexistence of piezoelectricity and electric conduction in oxygen-deficient NaNbO3-delta sub-micron cubes MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, 2014, v.182, 81-85
- Composition variations in Cu2ZnSnSe4 thin films analyzed by X-ray diffraction, energy dispersive X-ray spectroscopy, particle induced X-ray emission, photoluminescence, and Raman spectroscopy Thin Solid Films, 2014, v.562, 109-113
- Effects of Cu2-xS phase removal on surface potential of Cu2ZnSnS4 thin-films grown by electroplating CURRENT APPLIED PHYSICS, 2014, v.14 no.12, 1665-1668
- Ferromagnetism and Ru-Ru distance in SrRuO3 thin film grown on SrTiO3 (111) substrate NANOSCALE RESEARCH LETTERS, 2014, v.9, 8
- Lead-free LiNbO3 nanowire-based nanocomposite for piezoelectric power generation NANOSCALE RESEARCH LETTERS, 2014, v.9, 4
- Nanoscale observation of surface potential and carrier transport in Cu2ZnSn(S,Se)(4) thin films grown by sputtering-based two-step process NANOSCALE RESEARCH LETTERS, 2014, v.9, 10
- Observation of adhesive force and energy of adsorbents on rubber substrates by atomic force microscopy SURFACE AND INTERFACE ANALYSIS, 2014, v.46 no.7, 497-504
- Optical imaging methods for qualification of superconducting wires Progress in Superconductivity and Cryogenics (PSAC), 2014, v.16 no.4, 21-25
- Piezoelectric power generation of vertically aligned lead-free (K,Na)NbO3 nanorod arrays RSC Advances, 2014, v.4 no.56, 29799-29805
- Size dependent bipolar resistance switching of NiO nanodots for low-power and multi-state operation NANOTECHNOLOGY, 2014, v.25 no.41
- Strong pinning in very fast grown reactive co-evaporated GdBa2Cu3O7 coated conductors APL MATERIALS, 2014, v.2 no.8
- Structural properties and phase formation of epitaxial PbVO3 thin films grown on LaAlO3(001) by pulsed laser deposition JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2014, v.47 no.24, Article ID 245302
- Surface potential on grain boundaries and intragrains of highly efficient Cu2ZnSn(S,Se)4 thin-films grown by two-step sputtering process Solar Energy Materials and Solar Cells, 2014, v.127, 129-135
- The structure, phase and chemical composition of CZTSe thin films Functional Materials, 2014, v.21 no.2, 164-170
- Effect of selenization on local current and surface potential of sputtered Cu2ZnSn(S, Se)4 thin-films with 8% conversion efficiency Conference Record of the IEEE Photovoltaic Specialists Conference, 2013, 2013, 383-385
- Effects of iron concentration and cationic site disorder on the optical properties of magnetoelectric gallium ferrite thin films RSC Advances, 2013, v.3 no.9, 3124-3130
- Effects of substrates on structural and optical properties of Cu-poor CuGaSe2 thin films prepared by in-situ co-evaporation Current Applied Physics, 2013, v.13 no.5, 907-912
- [학술지논문] Chemical tailoring of sodium content for optimization of interfacial band bending and alignment in flexible kesterite solar cells SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2021, v.230 no.0 , 11243-11243
- [학술지논문] Photo-induced defects in MAPbBr(3) single crystals JOURNAL OF PHYSICS-ENERGY, 2021, v.3 no.4 , 044005-044005
Courses
-
2024-1st
-
General Physics Ⅰ 강의 계획서 상세보기
- Subject No 20409Class No 02
- 1Year ( 3Credit , 3Hour) Mon 6~6 (POSCO363) , Wed 5~5 (POSCO363)
-
-
2023-2nd
-
Solid State Physics II
- Subject No G12116Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (D109)
-
-
2023-1st
-
Solid State Physics I
- Subject No G11972Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (D108)
-
-
2022-2nd
-
Start-up seminar with intellectual property based on basic sciences
- Subject No 11440Class No 01
- Year ( 1Credit , 1Hour) Thu 6~6 (SCI-)
-
Mechanics II
- Subject No 20519Class No 01
- 2Year ( 3Credit , 3Hour) Mon 2~2 (POSCO451) , Thu 3~3 (POSCO451)
- Major Requisite
-
Current Topics in Physics II 강의 계획서 상세보기
- Subject No 35984Class No 01
- 3Year ( 1Credit , 1Hour) Wed 7~7 (SCI-AA)
-
Solid State Physics II
- Subject No G12116Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (D109)
-
-
2022-1st
-
Physics Laboratory I
- Subject No 20512Class No 01
- 2Year ( 2Credit , 3Hour) Tue 4~5 (SCI-AA416)
-
Mechanics I
- Subject No 20518Class No 01
- 2Year ( 3Credit , 3Hour) Mon 4~4 (POSCO361) , Thu 5~5 (POSCO361)
-
Current Topics in Physics I 강의 계획서 상세보기
- Subject No 35983Class No 01
- 3Year ( 1Credit , 1Hour) Wed 7~7
-
Solid State Physics I
- Subject No G11972Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (-)
-
-
2021-2nd
-
Mechanics II
- Subject No 20519Class No 01
- 2Year ( 3Credit , 3Hour) Tue 3~3 , Thu 2~2
- Major Requisite
-
Solid State Physics II
- Subject No G12116Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (D108)
-
-
2021-1st
-
Physics Laboratory I
- Subject No 20512Class No 01
- 2Year ( 2Credit , 3Hour) Fri 5~6 (SCI-AA416)
-
Mechanics I
- Subject No 20518Class No 01
- 2Year ( 3Credit , 3Hour) Tue 5~5 , Thu 6~6
-
Solid State Physics I
- Subject No G11972Class No 01
- Year ( 3Credit , 3Hour) Mon 7~8 (-D109)
- Class Hour Changed
-
Academic Background
Seoul Nat'l Univ. 이학박사(물리학과)
Seoul Nat'l Univ. 이학석사(물리학과)
Seoul Nat'l Univ. 이학사(물리학과)
Work Experience
Vice President for Ewha University-Industry Collaboration Foundation 2017-06-14 ~ 2019-01-31
Associate Vice President for Office of Research 2017-06-14 ~ 2019-01-31
Division Chair, Division of Mathematical and Physical Sciences 2017-02-01 ~ 2017-06-25
Associate Dean, The College of Natural Sciences 2016-08-01 ~ 2017-06-25
Department Chair, Physics 2017-03-01 ~ 2017-06-25
Department Chair, Physics 2017-02-01 ~ 2017-06-25
Department Chair, Physics 2006-02-01 ~ 2009-01-31
Division Chair, Division of Mathematical and Physical Sciences 2007-03-01 ~ 2009-01-31
Assistant Dean. The College of Natural Sciences 2008-08-01 ~ 2009-01-31
Stanford Universityresearch associate 2002-04-01 ~ 2003-08-31
Stanford University post-doc 1999-05-01 ~ 2002-03-31
LG전자기술원 선임연구원 1995-07-24 ~ 1999-04-24