Abstract
Film uniformity and large crystalline size are indispensable and critical for obtaining high performance planar perovskite solar cells. Perovskite precursor composition plays a key role in the formation of high quality perovskite films. In this work, excess PbCl2is deliberately introduced, and is found to facilitate the solubility of CH3NH3I in concentrated solution at room temperature. The excess PbCl2is found to alter the formation pathway of perovskite thin films. Accordingly, the formation pathway is proposed. Analysis of the perovskite films and associated devices revealed that extremely uniform perovskite films consisting of large grains of several microns can be obtained with a small amount of excess PbCl2. The associated planar perovskite solar cells showed a reliable and reproducible efficiency of 16.1%.
| Original language | English |
|---|---|
| Pages (from-to) | 231-237 |
| Number of pages | 7 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 145 |
| DOIs | |
| Publication status | Published - 1 Feb 2016 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- PbCl 2
- Perovskite Solar cell
- Precursor composition
- Thin film formation
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
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