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Bandgap engineering in CZTSSe thin films via controlling S/(S+Se) ratio / Vijay C. Karade ; Jun Sung Jang ; Kuldeep Singh Gour ; Yeonwoo Park ; Hyeonwook Park ; Jin Hyeok Kim ; Jae Ho Yun 1

ABSTRACT 1

1. Introduction 1

2. Materials and Methods 2

2.1. Stacked Metallic precursor preparation 2

2.2. CZTSSe absorber preparation 2

2.3. Device fabrication process 2

2.4. Analysis of CZTSSe thin films and devices 2

3. Results and discussion 2

3.1. Compositional and morphological properties 2

3.2. Optical and electrical properties 4

4. Conclusions 6

References 7

초록보기

The earth-abundant element-based Cu2ZnSn(S,Se)4 (CZTSSe) thin film solar cells (TFSCs) have attracted greater attention in the photovoltaic (PV) community due to their rapid development in device power conversion efficiency (PCE) >13%. In the present work, we demonstrated the fine-tuning of the bandgap in the CZTSSe TFSCs by altering the sulfur (S) to the selenium (Se) chalcogenide ratio. To achieve this, the CZTSSe absorber layers are fabricated with different S/(S+Se) ratios from 0.02 to 0.08 of their weight percentage. Further compositional, morphological, and optoelectronic properties are studied using various characterization techniques. It is observed that the change in the S/(S+Se) ratios has minimal impact on the overall Cu/(Zn+Sn) composition ratio. In contrast, the S and Se content within the CZTSSe absorber layer gets altered with a change in the S/(S+Se) ratio. It also influences the overall absorber quality and gets worse at higher S/(S+Se). Furthermore, the device performance evaluated for similar CZTSSe TFSCs showed a linear increase and decrease in the open circuit voltage (Voc) and short circuit current density (Jsc) of the device with an increasing S/(S+Se) ratio. The external quantum efficiency (EQE) measured also exhibited a linear blue shift in absorption edge, increasing the bandgap from 1.056 eV to 1.228 eV, respectively.

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Bandgap engineering in CZTSSe thin films via controlling S/(S+Se) ratio Vijay C. Karade, Jun Sung Jang, Kuldeep Singh Gour, Yeonwoo Park, Hyeonwook Park, Jin Hyeok Kim, Jae Ho Yun p. 67-74

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가로세로 폭의 제어가 가능한 슁글드 디자인 태양광 모듈 제조 = Fabrication of shingled design solar module with controllable horizontal and vertical width 박민준, 김민섭, 이은비, 김유진, 정채환 p. 75-78

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PM6:Y6를 기반으로 한 삼중 혼합 유기 태양전지 동향 = Ternary blend organic solar cells trends based on PM6:Y6 윤동환, 신광용, 정윤혜, 하영우, 김기환 p. 79-86

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페로브스카이트 실내 광전변환 효율 향상을 위한 ethylenediamine 기반의 표면 결함 부동화 연구 = Ethylenediamine based surface defect passivation for enhancing indoor photovoltaic efficiency of perovskite 강석범, 윤주웅, 김창용, 이상헌, 이혜민, 김동회 p. 87-95

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주석-납 기반 페로브스카이트 고농도 전구체 용액을 이용한 광전류 향상 연구 = Study for improved photocurrent via high concentrated tin-lead perovskite precursor solution 홍효진, 이승민, 임정민, 노준홍 p. 96-102

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참고문헌 (29건) : 자료제공( 네이버학술정보 )

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번호 참고문헌 국회도서관 소장유무
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15 Yu, J., Deng, H., Zhang, Q., Tao, J., Sun, L., Yang, P., Chu, J., “The Role of Tuning Se/(S + Se) Ratio in the Improvement of Cu2MnSn(S, Se)4 Thin Films Properties and Photovoltaic Device Performance,” Sol. Energy, 179, 279-285 (2019). https://doi.org/10.1016/j.solener.2018.12.076. 미소장
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21 Xie, H., Dimitrievska, M., Fontané, X., Sánchez, Y., López Marino, S., Izquierdo-Roca, V., Bermúdez, V., Pérez-Rodríguez, A., Saucedo, E., “Formation and Impact of Secondary Phases in Cu-Poor Zn-Rich Cu2ZnSn(S1−Se )4 (0≤y≤1) Based Solar Cells,” Sol. Energy Mater. Sol. Cells, 140, 289-298 (2015). https://doi.org/10.1016/j.solmat.2015.04.023. 미소장
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24 Just, J., Sutter-Fella, C. M., Lützenkirchen-Hecht, D., Frahm, R., Schorr, S., Unold, T., “Secondary Phases and Their Influence on the Composition of the Kesterite Phase in CZTS and CZTSe Thin Films,” Phys. Chem. Chem. Phys., 18(23), 15988-15994(2016). https://doi.org/10.1039/C6CP00178E. 미소장
25 Sravani, L., Routray, S., Pradhan, K. P., Piedrahita, M. C., “Kesterite Thin‐Film Solar Cell: Role of Grain Boundaries and Defects in Copper-Zinc-Tin-Sulfide and Copper-Zinc-Tin Selenide,” Phys. status solidi, 218(16), 2100039 (2021). https://doi.org/10.1002/pssa.202100039. 미소장
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