Enhancement of Perovskite Solar-Cell Efficiency Using FAPbBr(3)/I-3 with Methylammonium Chloride
- Authors
- Joo, Sung Hwan; Bark, Chung Wung; Choi, Hyung Wook
- Issue Date
- Jun-2021
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- alpha-Phase FAPbI(3); FAPbBr(3); MACl; Perovskite Solar Cells
- Citation
- JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS, v.16, no.6, pp.879 - 883
- Journal Title
- JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
- Volume
- 16
- Number
- 6
- Start Page
- 879
- End Page
- 883
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/83211
- DOI
- 10.1166/jno.2021.3015
- ISSN
- 1555-130X
- Abstract
- Organic/inorganic metal halide formamidinium lead iodide (FAPbI(3)) perovskites exhibit excellent optical properties, a suitable band gap, a wide light-absorption range, and superior electron-hole mobility. However, it is difficult to fabricate high-quality alpha-phase FAPbI3 film due to the relatively easy formation of the more stable 5-FAPbI(3) (hexagonal structure). To overcome this, in this study, formamidinium lead bromide (FAPbBr(3)) was used to induce the synthesis of stable alpha-phase FAPbI(3). The resulting light-absorbing layer was composed of (FAPbI(3))(0.95)(FAPbBr(3))(0.05), but 5-phase FAPbI(3) could be still observed. To suppress the formation of delta-phase FAPbI(3), methylammonium chloride (MACl) was added to the (FAPbI(3))(0.95)(FAPbBr(3))(0.05) precursor solution. At an optimal MACl content of 40 mol%, perovskites with improved crystallinity and large crystallite size could be fabricated, resulting in a perovskite solar-cell efficiency of 18.204%.
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