Enhanced Efficiency and Stability of an Aqueous Lead-Nitrate-Based Organometallic Perovskite Solar Cell
SCIE
SCOPUS
- Title
- Enhanced Efficiency and Stability of an Aqueous Lead-Nitrate-Based Organometallic Perovskite Solar Cell
- Authors
- Dipak V. Shinde; Limok Pyeon; Mingyuan Pei; Guan-Woo Kim; Hoichang Yang; PARK, TAIHO
- Date Issued
- 2017-03
- Publisher
- AMER CHEMICAL SOC
- Abstract
- We investigate the stability of an active organometallic perovskite layer prepared from a two-step solution procedure, including spin coating of aqueous lead nitrate (Pb(NO3)(2)) as a Pb2+ source and sequential dipping into a methylammonium iodide (CH3NH3I) solution. The conversion of CH3NH3PbI3 from a uniform Pb(NO3)2 layer generates PbI2-free and large-grain perovskite crystallites owing to an intermediate ion exchange reaction step, resulting in improved humidity resistance and, thereby, improved long-term stability with 93% of the initial power conversion efficiency (PCE) after a period of 20 days. The conventional fast-converted PbI2-dimethylformamide solution system leaves small amounts of intrinsic PbI2 residue on the resulting perovskite and MAPbI(3) crystallites with uncontrollable sizes. This accelerates the generation of PbI2 and the decomposition of the perovskite layer, resulting in poor stability with less than 60% of the initial PCE after a period of 20 days.
- Keywords
- perovskite; lead nitrate; stability; aqueous; solar cell
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/39171
- DOI
- 10.1021/acsami.7b01864
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials & Interfaces, vol. 9, no. 16, page. 14023 - 14030, 2017-03
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