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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
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Efficient perovskite solar cells fabricated using an aqueous lead nitrate precursor
Tsung-Yu Hsieh1, Tzu-Chien Wei, Kuan-Lin Wu
1Department of Chemical Engineering, National Tsing-Hua University, Taiwan. tcwei@mx.nthu.edu.tw.
Chemical Communications (Cambridge, England)
|July 24, 2015
Summary
Researchers developed a new aqueous precursor system for methylammonium lead iodide perovskite solar cells (PSCs), achieving 12.58% power conversion efficiency by controlling film morphology.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Conventional fabrication of methylammonium lead iodide (MAPbI3) perovskite solar cells (PSCs) relies on lead iodide (PbI2) and dimethylformamide (DMF).
- This method presents environmental and processing challenges.
Purpose of the Study:
- To develop a novel, environmentally benign aqueous precursor system for MAPbI3 PSC fabrication.
- To investigate the impact of precursor film morphology and surface coverage on device performance.
Main Methods:
- Aqueous precursor system using lead nitrate (Pb(NO3)2) and water was developed.
- Controlled coating techniques were employed to manage the morphology and surface coverage of the Pb(NO3)2 precursor film.
Main Results:
- A power conversion efficiency (PCE) of 12.58% was achieved for the fabricated PSCs under standard AM1.5, 100 mW cm(-2) conditions.
- The aqueous precursor system demonstrated viability for efficient PSC fabrication.
Conclusions:
- The novel aqueous precursor system offers a promising alternative to conventional methods for MAPbI3 PSCs.
- Controlling precursor film characteristics is crucial for optimizing perovskite solar cell performance.
