Search Results - "Yoo, Hyesun"

Growth of Cu2ZnSnS4 thin films using sulfurization of stacked metallic films by YOO, Hyesun, KIM, Junho

“…We fabricated Cu2ZnSnS4 (CZTS) thin films through sulfurization of stacked metallic films. Three types of Cu-Zn-Sn metallic films, i.e., Cu-rich, Cu-correct…”
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Sulfurization temperature effects on the growth of Cu2ZnSnS4 thin film by Yoo, Hyesun, Kim, JunHo, Zhang, Lixin

“…We made Cu2ZnSnS4 (CZTS) thin films by sulfurization of Cu/Sn/Cu/Zn metallic films. Sulfurizations were carried out under different thermal annealing…”
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Formation of Cu2SnSe3 from stacked elemental layers investigated by combined in situ X-ray diffraction and differential scanning calorimetry techniques by Wibowo, Rachmat Adhi, Moeckel, Stefan, Yoo, Hyesun, Hoelzing, Astrid, Hock, Rainer, Wellmann, Peter J.

“…•In situ investigation revealed intermetallic compounds and Cu2SnSe3 formations.•CuSe phase dominates binary phase formations at a low annealing…”
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Comparative study of Cu2ZnSnS4 film growth by YOO, Hyesun, KIM, Junho

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Estimating time-varying causal excursion effects in mobile health with binary outcomes by Qian, Tianchen, Yoo, Hyesun, Klasnja, Predrag, Almirall, Daniel, Murphy, Susan A

“…Summary Advances in digital technology and wearables have made it possible to deliver behavioural mobile health interventions to individuals in their everyday…”
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Effect of Crystal Orientation and Conduction Band Grading of Absorber on Efficiency of Cu(In,Ga)Se 2 Solar Cells Grown on Flexible Polyimide Foil at Low Temperature by Kim, SeongYeon, Yoo, Hyesun, Rana, Tanka Raj, Enkhbat, Temujin, Han, Gyuho, Kim, JunHo, Song, Soomin, Kim, Kihwan, Gwak, Jihye, Eo, Young‐Ju, Yun, Jae Ho

“…Abstract Flexible Cu(In,Ga)Se 2 (CIGS) solar cells are developed on polyimide (PI) foil by using a three‐stage co‐evaporation method. To deposit CIGS on a PI…”
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A Facile Process for Partial Ag Substitution in Kesterite Cu2ZnSn(S,Se)4 Solar Cells Enabling a Device Efficiency of over 12 by Gang, Myeng Gil, Karade, Vijay C, Suryawanshi, Mahesh P, Yoo, Hyesun, He, Mingrui, Hao, Xiaojing, Lee, In Jae, Lee, Byeong Hoon, Shin, Seung Wook, Kim, Jin Hyeok

“…A cation substitution in Cu2ZnSn­(S,Se)4 (CZTSSe) offers a viable strategy to reduce the open-circuit voltage (V oc)-deficit by altering the characteristics of…”
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The Microrandomized Trial for Developing Digital Interventions: Experimental Design and Data Analysis Considerations by Qian, Tianchen, Walton, Ashley E., Collins, Linda M., Klasnja, Predrag, Lanza, Stephanie T., Nahum-Shani, Inbal, Rabbi, Mashfiqui, Russell, Michael A., Walton, Maureen A., Yoo, Hyesun, Murphy, Susan A.

“…Just-in-time adaptive interventions (JITAIs) are time-varying adaptive interventions that use frequent opportunities for the intervention to be adapted-weekly,…”
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Over 11 % efficient eco-friendly kesterite solar cell: Effects of S-enriched surface of Cu2ZnSn(S,Se)4 absorber and band gap controlled (Zn,Sn)O buffer by Lee, Jiwon, Enkhbat, Temujin, Han, Gyuho, Sharif, Md Hamim, Enkhbayar, Enkhjargal, Yoo, Hyesun, Kim, Jin Hyeok, Kim, SeongYeon, Kim, JunHo

“…For high efficiency kesterite Cu2ZnSn(S,Se)4 (CZTSSe) solar cell, CdS thin film was usually used as a buffer layer. However, due to the toxicity of Cd and…”
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Rejoinder: 'Estimating time-varying causal excursion effects in mobile health with binary outcomes' by Qian, Tianchen, Yoo, Hyesun, Klasnja, Predrag, Almirall, Daniel, Murphy, Susan A

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Growth of sprayed CIS film and post-sulfurization effects by Dong-Yeup Lee, Hyesun Yoo, Ki-Bong Song, Jae Ho Yun, Kyunghoon Yoon, JunHo Kim

“…We studied CuInS 2 (CIS) film growth using high electrostatic field assisted ultrasonic spray deposition. All the sprayed CIS films were observed to be grown…”
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Estimating time-varying causal excursion effect in mobile health with binary outcomes by Qian, Tianchen, Yoo, Hyesun, Klasnja, Predrag, Almirall, Daniel, Murphy, Susan A

“…Advances in wearables and digital technology now make it possible to deliver behavioral mobile health interventions to individuals in their everyday life. The…”
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Influence of the Reaction Pathway on the Defect Formation in a Cu2ZnSnSe4 Thin Film by Yoo, Hyesun, Jang, Jun Sung, Shin, Seung Wook, Lee, Jiwon, Kim, JunHo, Kim, Dong Myeong, Lee, In Jae, Lee, Byeong Hoon, Park, Jongsung, Kim, Jin Hyeok

“…Point defect engineering in Cu2ZnSnSe4 (CZTSe) thin films is the main issue to improve its device performance. This study reveals the correlation between the…”
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Statistical Tools for Directed and Bipartite Networks by Yoo, Hyesun

“…Directed networks and bipartite networks, which exhibit unique asymmetric connectivity structures, are commonly observed in a variety of scientific and…”
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Comparative study of Cu 2ZnSnS 4 film growth by Yoo, Hyesun, Kim, JunHo

“…We fabricated Cu 2ZnSnS 4 (CZTS) thin films using two different methods, spray pyrolysis and sulfurization of Cu–Zn–Sn metallic films. Spray pyrolysis was…”
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Influence of the Reaction Pathway on the Defect Formation in a Cu 2 ZnSnSe 4 Thin Film by Yoo, Hyesun, Jang, Jun Sung, Shin, Seung Wook, Lee, Jiwon, Kim, JunHo, Kim, Dong Myeong, Lee, In Jae, Lee, Byeong Hoon, Park, Jongsung, Kim, Jin Hyeok

“…Point defect engineering in Cu ZnSnSe (CZTSe) thin films is the main issue to improve its device performance. This study reveals the correlation between the…”
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Uncovering Biological Factors That Regulate Hepatocellular Carcinoma Growth Using Patient‐Derived Xenograft Assays by Zhu, Min, Li, Lin, Lu, Tianshi, Yoo, Hyesun, Zhu, Ji, Gopal, Purva, Wang, Sam C., Porembka, Matthew R., Rich, Nicole E., Kagan, Sofia, Odewole, Mobolaji, Renteria, Veronica, Waljee, Akbar K., Wang, Tao, Singal, Amit G., Yopp, Adam C., Zhu, Hao

“…Background and Aims Several major factors limit our understanding of hepatocellular carcinoma (HCC). First, human HCCs are infrequently biopsied for diagnosis…”
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Helical pitch-dependent electro-optics of optically high transparent nano-phase separated liquid crystals by Pagidi, Srinivas, Manda, Ramesh, Lim, Young Jin, Song, Seong Min, Yoo, Hyesun, Woo, Jong Hoon, Lin, Yi-Hsin, Lee, Seung Hee

“…Feeble light leakage in a dark state of conventional optically isotropic liquid crystal (OILC) device has a strong impact on the contrast ratio of a liquid…”
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Achieving Low V OC -deficit Characteristics in Cu 2 ZnSn(S,Se) 4 Solar Cells through Improved Carrier Separation by Karade, Vijay, Choi, Eunyoung, Gang, Myeng Gil, Yoo, Hyesun, Lokhande, Abhishek, Babar, Pravin, Jang, Jun Sung, Seidel, Jan, Yun, Jae Sung, Park, Jongsung, Kim, Jin Hyeok

“…Kesterite-based thin-film solar cells (TFSCs) have recently gained significant attention in the photovoltaic (PV) sector for their elemental earth abundance…”
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The alterations of carrier separation in kesterite solar cells by Yang, Kee-Jeong, Kim, Sammi, Sim, Jun-Hyoung, Son, Dae-Ho, Kim, Dae-Hwan, Kim, Juran, Jo, William, Yoo, Hyesun, Kim, JunHo, Kang, Jin-Kyu

“…Cu2ZnSn(S,Se)S4 (CZTSSe) thin films have attracted attention as low-cost absorber materials for solar cells; however, further studies are required to develop…”
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