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Title: | A (CH 3 NH 3 ) 3 Bi 2 I 9 Perovskite Based on a Two-Step Deposition Method: Lead-Free, Highly Stable, and with Enhanced Photovoltaic Performance |
Authors: | Ahmad, Khursheed Ansari, Shagufi Naz Natarajan, Kaushik Mobin, Shaikh M. |
Keywords: | Atmospheric humidity;Bismuth compounds;Deposition;Efficiency;Nanocomposites;Open circuit voltage;Perovskite;Solar cells;Tin oxides;Atmospheric conditions;Device architectures;Fluorine doped tin oxide;Lead-free perovskites;Photovoltaic performance;Power conversion efficiencies;Power sources;Two step depositions;Perovskite solar cells |
Issue Date: | 2019 |
Publisher: | Wiley-VCH Verlag |
Citation: | Ahmad, K., Ansari, S. N., Natarajan, K., & Mobin, S. M. (2019). A (CH 3 NH 3 ) 3 bi 2 I 9 perovskite based on a two-step deposition method: Lead-free, highly stable, and with enhanced photovoltaic performance. ChemElectroChem, 6(4), 1192-1198. doi:10.1002/celc.201801322 |
Abstract: | Despite achieving a higher efficiency, lead-based perovskite solar cells (PSCs) suffer from leakage of highly toxic Pb into the atmosphere. On the contrary, methyl ammonium bismuth halide (MBI) has gained enormous attention as a light absorber because of its low toxicity and air stability. Herein, we developed high-performance, lead-free PSCs by employing a modified two-step deposition method with FTO/CL-TiO 2 /m-TiO 2 /MBI/Spiro-MEOTAD/Au device architecture [where FTO: fluorine doped tin oxide; MBI: (MA) 3 Bi 2 I 9 ; MEOTAD: 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene]. The PSCs fabricated by the two-step deposition method showed a good power-conversion efficiency of 0.41 %, along with a high open circuit voltage of 870 mV, and were found to be highly stable up to 60 days under atmospheric conditions (humidity ∼40–50 %). The film quality of the MBI was found to be superior by introducing modified two-step deposition method over one-step deposition. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://doi.org/10.1002/celc.201801322 https://dspace.iiti.ac.in/handle/123456789/8928 |
ISSN: | 2196-0216 |
Type of Material: | Journal Article |
Appears in Collections: | Department of Chemistry |
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