Sputtering of TiO2 for High-Efficiency Perovskite and 23.1% Perovskite/Silicon 4-Terminal Tandem Solar Cells
- Sputtering of TiO2 for High-Efficiency Perovskite and 23.1% Perovskite/Silicon 4-Terminal Tandem Solar Cells
- 김원목; 천홍필; 최성빈; 이상원; 배수현; 조경진; 김성택; 황재근; 이원규; 이솔희; 현지연; 이승훈; 강윤묵; 이해석; 김동환
- perovskite solar cells; transparent perovskite solar cells; perovskite/silicon 4-terminal tandem; radio frequency (RF) magnetron sputtering; hole-blocking layer; compact TiO2
- Issue Date
- ACS applied energy materials
- VOL 2, NO 9-6268
- Radio frequency (RF) magnetron-sputtered TiO2 (RS-TiO2) is investigated as a hole-blocking layer for perovskite solar cells. RS-TiO2 shows conformal, dense, and efficiently electron transferable properties. Power conversion efficiency (PCEs) of 20.9% were obtained with high reproducibility. RS-TiO2 also showed potential in the up-scaling process, transparent perovskite, and perovskite/silicon 4-terminal tandem solar cells. With increasing active area 40 times from 0.075 cm2 to 3 cm2 without dividing areas by laser patterning, less than 4% open-circuit voltage (Voc) and short-circuit current density (Jsc) drops were observed. This means RS-TiO2 layers can maintain their film quality even when the area size is increased. Furthermore, by applying RS-TiO2 to transparent perovskite solar cells and perovskite/silicon 4-terminal tandem solar cells, PCEs of 16.7% and 23.1% were obtained, respectively.
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