Publications
Selected Publications
Seon Hong Mun, Yuseong Jang, R.B.V.Chalapathy, Byung Tae Ahn, Jin Hyung Ahn, Jeong Woo Park, Kihwan Kim, Jae Ho Yun, “A new method of generating Ga slope in Cu (In, Ga) Se2 film by controlling Se content in a multi-stacked precursor”, Current Applied Physics 21 (2021) 147-154
Yunae Cho, Jiseon Hwang, Inyoung Jeong, Jihye Gwak, Jae Ho Yun, Kihwan Kim, William Jo, “Photon-induced defects and dynamics of photogenerated carriers in Cu (In, Ga) Se2 thin film solar cells, Solar Energy Materials and Solar Cells 220 110860 (2021)
Muhammad Saifullah, Jae Ho Yun, Jihye Gwak, Joo Hyung Park, Yunae Cho, T.Bertrame, T.Kodalle, R.Schlatmann, C.A.Kaufmann, “Understanding deposition temperature dependent photovoltaic characteristics of Cu(In,Ga)Se2 solar cells: A study with thermally stable alkali alumino silicate glass substrates”, Solar Energy Materials and Solar Cells 221110875 (2021)
Min Jeong Shin, Ahreum Lee, Ara Cho, Kihwan Kim, Seung Kyu Ahn, Joo Hyung Park, Jinsu Yoo, Jae Ho Yun, Jihye Gwak, Donghyeop Shin, Inyoung Jeong, Jun-Sik Cho, “Semitransparent and bifacial ultrathin Cu (In, Ga) Se2 solar cells via a single-stage process and light-management strategy”, Nano Energy 82 105729 (2021)
Dongryeol Kim, Sang Su Shin, Sang Min Lee, Jun‐Sik Cho, Jae Ho Yun, Ho Seong Lee, Joo Hyung Park, “Ultra‐Thin Glass: Flexible and Semi‐Transparent Ultra‐Thin CIGSe Solar Cells Prepared on Ultra‐Thin Glass Substrate: A Key to Flexible Bifacial Photovoltaic Applications”, Adv. Funct. Mater. 36 (2020)
Kihwan Kim, Inyoung Jeong, Yunae Cho, Donghyeop Shin, Soomin Song, Seung Kyu Ahn, Young-Joo Eo, Ara Cho, Chanwon Jung, William Jo, Jin Hyeok Kim, Pyuck-Pa Choi, Jihye Gwak, Jae Ho Yun, “Mechanisms of extrinsic alkali incorporation in CIGS solar cells on flexible polyimide elucidated by nanoscale and quantitative analyses” Nano Energy 67 104201 (2020)
Muhammad Saifullah, Dongryeol Kim, Jun-Sik Cho, Seungkyu Ahn, SeJin Ahn, Jae Ho Yun, Ho Seong Lee, Joo Hyung Park “The role of NaF post-deposition treatment on the photovoltaic characteristics of semitransparent ultrathin Cu (In, Ga) Se 2 solar cells prepared on indium-tin-oxide back contacts: a comparative study”, Journal of Materials Chemistry A 7(38) 21843-21853 (2019)
Seung Tae Kim, Liudmila Larina, Jae Ho Yun, Byungha Shin, Byung Tae Ahn, “Surface passivation and point defect control in Cu (In, Ga) Se 2 films with a Na 2 S post deposition treatment for higher than 19% CIGS cell performance”, Sustainable energy & fuels 3(3) 709-716 (2019)
Kihwan Kim, Juran Kim, Myeng Gil Gang, Se-Ho Kim, Soomin Song, Yunae Cho, Donghyeop Shin, Young-Joo Eo, Inyoung Jeong, Seung Kyu Ahn, Ara Cho, Jayeong Kim, Seokhyun Yoon, Pyuck-Pa Choi, William Jo, Jin Hyeok Kim, Jihye Gwak, Jae HoYun, “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 195 280-290 (2019)
Hojin Lee, Yuseong Jang, Sung-Wook Nam, Chanwon Jung, Pyuck-Pa Choi, Jihye Gwak, Jae Ho Yun, Kihwan Kim, Byungha Shin, “ Passivation of deep-level defects by cesium fluoride post-deposition treatment for improved device performance of Cu (In, Ga) Se2 solar cells”, ACS applied materials & interfaces 11(39) 35653-35660 (2019)
Sang yeob Lee, Jun Su Lee, Jiseong Jang, Ki-Ha Hong, Doh-Kwon Lee, Soomin Song, Kihwan Kim, Young-Joo Eo, Jae Ho Yun, Jihye Gwak, Choong-Heui Chung, “Robust nanoscale contact of silver nanowire electrodes to semiconductors to achieve high performance chalcogenide thin film solar cells”, Nano Energy 53 675-682 (2018)
Muhammad Saifullah, Shafket Rasool, SeJin Ahn, Kihwan Kim, Jun-Sik Cho, Jinsu Yoo, Won Suk Shin, Jae Ho Yun, Joo Hyung Park, “Performance and Uniformity Improvement in Ultrathin Cu (In, Ga) Se2 Solar Cells with a WO x Nanointerlayer at the Absorber/Transparent Back-Contact Interface”, ACS applied materials & interfaces 11(1) 655-665 (2018)
Seong Yeon Kim, Hyesun Yoo, Tanka Raj Rana, Temujin Enkhbat, Gyuho Han, Jun Ho Kim, Soomin Song, Kihwan Kim, Jihye Gwak, Young‐Ju Eo, Jae Ho Yun , “Effect of crystal orientation and conduction band grading of absorber on efficiency of Cu (In, Ga) Se2 solar cells grown on flexible polyimide foil at low temperature”, Advanced Energy Materials 8(26) 1801501 (2018)
Muhammad Saifullah, Kihwan Kim, Rauf Shahzad, Jihye Gwak, Jun-Sik Cho, Jin-Su Yoo, Jae Ho Yun, Joo Hyung Park, “Insertion of the AGS layer at the CIGSe/ITO interface: A way to reduce the formation of the GaOx interfacial phase in CIGSe solar cells”, Solar Energy Materials and Solar Cells 178 29-37 (2018)
R.B.V.Chalapathy, Myeng Gil Gang, Chang Woo Hong, Ji Hun Kim, Jun Sun Jang, Jae Ho Yun, Jin Hyeok Kim, “Performance of CZTSSe thin film solar cells fabricated using a sulfo-selenization process: Influence of the Cu composition”, Solar Energy 159 260-269 (2018)
Ji Hye Kim, Seung Tae Kim, Liudmila Larina, Byung Tae Ahn. KiHwan Kim, Jae Ho Yun, “Increase in conversion efficiency of above 14% in Cu (In, Ga) 3Se5 (β-CIGS) solar cells by Na2S incorporation through the surface of β–CIGS film”, Solar Energy Materials and Solar Cells 179 289-296 (2018)
Kihwan Kim, Seung Kyu Ahn, Jang Hoon Choi, Jinsoo Yoo, Young-Joo Eo, Jun-Sik Cho, Ara Cho, Jihye Gwak, Soomin Song, Dae-Hyung Cho, Yong-Duck Chung, Jae Ho Yun, “Highly efficient Ag-alloyed Cu (In, Ga) Se2 solar cells with wide bandgaps and their application to chalcopyrite-based tandem solar cells”, Nano Energy 48 345-352 (2018)
Tanka Raj Rana, SeongYeon Kim, JunHo Kim, Kihwan Kim and Jae Ho Yun, “ A Cd-reduced hybrid buffer layer of CdS/Zn (O, S) for environmentally friendly CIGS solar cells”, Sustainable Energy & Fuels 1(9) 1981-1990 (2017)
Kim Ji Hye, Kim Seung Tae, Larina Liudmila, Ahn Byung Tae, Kim Ki Hwan, Yun Jae Ho, “Increase in conversion efficiency of above 14% in Cu(In,Ga)3Se5 (β-CIGS) solar cells by Na2S incorporation through the surface of β –CIGS film”, Solar Energy Materials and Solar Cells(2017)
Kim Kihwan, Yoo Jin Su, Ahn Seoung Kyu, Eo Young-Joo, Cho Jun-Sik, Gwak Jihye, Yun Jae Ho, “Performance prediction of chalcopyrite-based dual-junction tandem solar cells”, Solar energy(2017)
Kim Kihwan, Gwak Jihye, Ahn Seung Kyu, Eo Young-Joo, Park Joo Hyung, Cho Jun-Sik, Kang Min Gu, Song Hee-Eun, Yun Jae Ho, “Simulations of chalcopyrite/c-Si tandem cells using SCAPS-1D”, Solar energy(2017)
Saifullah Muhammad, Gwak Jihye, Park Joo Hyung, Ahn Seungkyu, Kim Kihwan, Eo Young Joo, Yun Jae Ho, “Effect of substrate temperature during the three-stage process on the CuInSe2 solar cell characteristics”, Current Applied Physics(2017)
Saifullah Muhammad, Moon Ji Hyun, Ahn SeJin, Gwak Jihye, Ahn Seungkyu, Kim Kihwan, Eo Young Joo, Yun Jae Ho, “Effect of Cu content on the photovoltaic properties of wide bandgap CIGS thin-film solar cells prepared by single-stage process”, CURRENT APPLIED PHYSICS(2016)
Muhammad Saifullah, SeJin Ahn, Jihye Gwak, Seungkyu Ahn, Kihwan Kim, Junsik Cho, Joo Hyung Park, Young Joo Eo, Ara Cho, Jin-Su Yoo, Jae Ho Yun, “Development of semitransparent CIGS thin-film solar cells modified with a sulfurized-AgGa layer for building applications”, JOURNAL OF MATERIALS CHEMISTRY A(2016)
Muhammad Saifullah, Jihye Gwak, Jae Ho Yun, “Comprehensive review on material requirements, present status, and future prospects for building-integrated semitransparent photovoltaics (BISTPV)”, JOURNAL OF MATERIALS CHEMISTRY A(2016)
Kihwan Kim, JooWan Park, Jin Su Yoo, Jun-sik Cho, Hi-DeokLee, Jae Ho Yun, “Ag incorporation in low-temperature grown Cu(In,Ga)Se2 solar cells using Ag precursor layers”, Solar Energy Materials & Solar Cells 146 (2016) 114–120
US Patents
2019 US Patent 10,465,868
Kihwan Kim, Ara Cho, Young-joo Eo, Joo-hyung Park, Jin-su Yoo, Jihye Gwak, Se-jin Ahn, Jae-ho Yun, Jun-sik Cho, Seung-kyu Ahn,
“Jig for sample for solar photovoltaic device and solar simulator including the same”
2019 US Patent 10,415,134
Kihwan Kim, Jun-sik Cho, Ara Cho, Jae-ho Yun, Kyung Hoon Yoon, Jin-su Yoo, Young-Joo Eo, Seoung-Kyu Ahn, SeJin Ahn, Kee Shik Shin
“Crucible for electron-beam evaporator”
2019 US Patent 10,283,654
Kihwan KIM, Jae Ho YUN, Jihye GWAK, Seung-kyu AHN, Jun-Sik CHO, Joo-hyung PARK, Young-Joo EO, Jin-su YOO, Se-jin AHN, Ara CHO
“Method of manufacturing cigs-based solar cell and cigs-based solar cell”
2018 US Patent 10,056,512
Ara Cho, Jun-Sik Cho, Jae-Ho Yun, SeJin Ahn, Jihye Gwak, Jin-Su Yoo, Seoung-Kyu Ahn, Joo-Hyung Park, Young-Joo Eo, Ki-Hwan Kim
“Method of forming chalcogen compound light-absorption layer thin film for solar cell”
2017 US Patent App. 14/757,521
Kim, Kihwan; Yun, Jae-ho; Cho, Jun-Sik; Gwak, Jihye; Eo, Young-Joo; Cho, Ara; YOON, Kyung Hoon; Shin, Kee Shik; Ahn, SeJin; Park, Joo-Hyung
“Forming method for acigs film at low temperature and manufacturing method for solar cell by using the
forming method”
2017 US Patent 9,634,162
Cho, Ara; Yoon, Kyung Hoon; Ahn, Sejin; Yun, Jae Ho; Eo, Young Joo; Gwak, Jihye; Shin, Kee Shik; Ahn, Seoungkyu; Cho, Jun Sik; Yoo, Jin-su;
“Method of fabricating A (C) IGS based thin film using Se-Ag2Se core-shell nanoparticles, A (C) IGS
based thin film fabricated by the same, and tandem solar cells including the A (C) IGS based thin film”
2017 US Patent 9,667,190
Ahn, Seoungkyu; Yoon, Kyung Hoon; Yun, Jae Ho; Cho, Jun Sik; Ahn, Sejin; Gwak, Jihye; Shin, Kee Shik; Kim, Kihwan; Park, Joo Hyung; Eo, Young Joo;
“Device for controlling sample temperature during photoelectric measurement and solar cell measurement
device using same”
2017 US Patent 9,780,246
Yun, Jae Ho; Gwak, Jihye; Ahn, Sejin; Yoon, Kyung Hoon; Shin, Kee Shik; Ahn, Seoungkyu; Cho, Ara; Park, Sang Hyun; Cho, Jun Sik; You, Jin Su;
“Method for manufacturing CZTS based thin film having dual band gap slope, method for manufacturing CZTS based solar cell having dual band gap slope and CZTS based solar cell thereof”
2016 US Patent 9,437,761
Eo, Young Joo; Yoon, Kyung Hoon; Ahn, Sejin; Gwak, Jihye; Yun, Jae Ho; Cho, Ara; Shin, Kee Shik; Ahn, Seoungkyu; Cho, Jun Sik; Yoo, Jin Su;
“Method of forming chalcopyrite light-absorbing layer”
2016 US Patent 9,472,708
Gwak, Jihye; Yun, Jae-ho; Ahn, Sejin; Yoon, Kyung Hoon; Shin, Kee Shik; Jeong, Guk-yeong; Ahn, Seoungkyu; Cho, Ara; Park, Hisun; Choi, Sung Woo;
“Method of fabricating copper indium gallium selenide (CIGS) thin film for solar cell using simplified co-vacuum evaporation and copper indium gallium selenide (CIGS) thin film for solar cell fabricated by the
same”
2016 US Patent App. 14/421,866
Cho, Ara; Yoon, Kyung Hoon; Ahn, Sejin; Yun, Jae Ho; Eo, Young Joo; Gwak, Jihye; Ahn, Seoungkyu; Cho, Jun Sik; Yoo, Jin Su; Kim, Kihwan;
“Method of manufacturing ci (g) s-based thin film including aging of slurry comprising binary nanoparticles, and ci (g) s-based thin film manufactured thereby”
2016 US Patent 9,496,449
Cho, Ara; Ahn, Sejin; Kyung-Hoon, YOON; Yun, Jae-ho; Gwak, Jihye; Shin, Kee-shik; Ahn, Seoungkyu; “Method for manufacturing CI (G) S-based thin film comprising Cu-Se thin film using Cu-Se two-component nanoparticle flux, and CI (G) S-based thin film manufactured by the method”
2016 US Patent 9,252,316
Cho, Jun Sik; Yoo, Jin Su; Park, Joo Hyung; Yun, Jae Ho; Gwak, Jihye; Ahn, Seoungkyu; Eo, Young Joo; Ahn, Sejin; Cho, Ara; Kim, Kihwan;
“Ultra-thin hit solar cell and fabricating method of the same”
2016 US Patent 9,159,865
Cho, Jun-sik; Kyung-Hoon, YOON; Ahn, Sejin; Gwak, Jihye; Yun, Jae-ho; Cho, Ara; Shin, Kee-shik; Ahn, Seoungkyu; Eo, Young-joo; Yoo, Jin-su;
“Method of forming zinc oxide prominence and depression structure and method of manufacturing solar cell using thereof”
2015 US Patent App. 14/364,886
Yun, Jae Ho; Gwak, Jihye; Ahn, Sejin; Yoon, Kyung Hoon; Shin, Kee Shik; Ahn, Seoungkyu; Cho, Ara; Park, Sang Hyun; Park, Hisun; Choi, Sung Woo
“Method of forming cigs absorber layer for solar cell and cigs solar cell”
2015 US Patent App. 14/389,884
Ahn, Seoungkyu; Yoon, Kyung Hoon; Yun, Jae Ho; Cho, Jun Sik; Ahn, Sejin; Gwak, Jihye; Shin, Kee Shik; Kim, Kihwan;
Park, Joo Hyung; Eo, Young Joo; “CIGS Solar Cell Having Flexible Substrate Based on Improved Supply of Na and Fabrication Method Thereof”
2014 US Patent 8,896,337
Park, Sang-hyun; Gwak, Jihye; Ahn, Sejin; Kyung-Hoon, YOON; Shin, Kee-shik; Ahn, Seoungkyu; Cho, Ara; Yun, Jae-ho; Cho, Jun-sik; Yoo, Jin-su;
“Apparatus and method for measurement of radiation intensity for testing reliability of solar cell, and method for testing reliability of solar cell”
2014 US Patent App. 14/118,522
Cho, Jun-Sik; Park, Sang-hyun; Yun, Jae-ho; Park, Joo-Hyung; Shin, Kee-Shik; Yoo, Jin-su; Kyung-Hoon, YOON;
“Transparent conducting film having double structure and method of manufacturing the same”
2014 US Patent 8,747,706
Yun, Jae-ho; Kyung-Hoon, YOON; Ahn, Sejin; Gwak, Jihye; Shin, Kee-shik; Kim, Kyoo-ho; Kim, Jin-hyeok;
“Cu—In—Zn—Sn-(Se, S)-based thin film for solar cell and preparation method thereof”
2013 US Patent 8,569,102
Ahn, Se-jin; Yun, Jae-ho; Gwak, Ji-hye; Cho, Ara; Kyung-Hoon, YOON; Shin, Kee-shik; Ahn, Seoung-kyu; Song, Ki-bong;
“Method of manufacturing high density CIS thin film for solar cell and method of manufacturing thin film solar cell using the same”