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Flash Infrared Annealing for Perovskite Solar Cell Processing
Published on: February 3, 2021
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Cesium lead iodide solar cells controlled by annealing temperature
Yu Geun Kim1, Tae-Yoon Kim2, Jeong Hyeon Oh1
1School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea. sooyoungkim@cau.ac.kr.
Physical Chemistry Chemical Physics : PCCP
|February 15, 2017
Summary
Optimizing cesium lead iodide (CsPbI3) perovskite films through controlled annealing and thickness enhances solar cell performance. This inorganic perovskite shows improved stability and a 4.88% power conversion efficiency, making it promising for solar applications.
Area of Science:
- Materials Science
- Renewable Energy
- Solid-State Physics
Background:
- Perovskite solar cells (PSCs) offer a promising alternative to traditional photovoltaics.
- Cesium lead iodide (CsPbI3) is an inorganic perovskite with potential for PSC applications.
- Optimizing CsPbI3 film properties is crucial for enhancing PSC performance and stability.
Purpose of the Study:
- To optimize inorganic cesium lead iodide (CsPbI3) perovskite films for solar cell applications.
- To investigate the effects of annealing temperature and layer thickness on CsPbI3 film properties.
- To evaluate the power conversion efficiency (PCE) and stability of CsPbI3-based PSCs.
Main Methods:
- CsPbI3 films were synthesized via one-step coating of CsI, PbI2, and HI additive in N,N-dimethylformamide.
- Annealing temperature was varied from 80 to 120 °C, and layer thickness was controlled by spin-coating speed.
- Film properties (phase, band gap, surface coverage, roughness) and PSC performance were analyzed.
Main Results:
- Annealing at 100 °C for 10 min yielded the black phase CsPbI3 with a 1.69 eV band gap.
- Optimized films exhibited 100% surface coverage and minimized root-mean-square (rms) roughness (3.03 nm).
- CsPbI3-based PSCs achieved a PCE of 4.88% with enhanced charge transport and reduced accumulation.
Conclusions:
- Optimized CsPbI3 films demonstrate superior properties for perovskite solar cells.
- CsPbI3-based PSCs exhibit enhanced stability compared to hybrid organic-inorganic counterparts.
- CsPbI3 is a viable candidate for future solar cell technologies due to its performance and stability.
