期刊
ADVANCED MATERIALS
卷 31, 期 18, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201808344
关键词
alloys; chalcohalides; lead-free; SbxBi1-xSI; solar cells
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2018R1A3B1052820]
- UNIST - Ulsan city [1.190028.01]
- National Research Foundation of Korea [2018R1A3B1052820] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Sb1-xBixSI, an isostructural material with the well-known quasi-1D SbSI, possesses good semiconductive and ferroelectric properties but is not applied in solar cells. Herein, solar cells based on alloyed Sb0.67Bi0.33SI (ASBSI) as a light harvester are fabricated. ASBSI is prepared through the reaction of bismuth triiodide in N, N-dimethylformamide solution with an antimony trisulfide film deposited on a mesoporous (mp)-TiO2 electrode via chemical bath deposition at 250 degrees C under an argon or nitrogen atmosphere; the alloy exhibits a promising bandgap (1.62 eV). The best performing cell fabricated with poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b'] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] as the hole-transporting layer shows 4.07% in a power conversion efficiency (PCE) under the standard illumination conditions of 100 mW cm(-2). The unencapsulated cells exhibit good comprehensive stability with retention of 92% of zjr initial PCE under ambient conditions of 60% relative humidity over 360 h, 93% after 1 sun illumination for 1254 min, and 92% after storage at 85 degrees C in air for 360 h.
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