School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea.
Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA.
Nat Commun. 2016 May 23;7:11735. doi: 10.1038/ncomms11735.
Most research on perovskite solar cells has focused on improving power-conversion efficiency and stability. However, if one could refurbish perovskite solar cells, their stability might not be a critical issue. From the perspective of cost effectiveness, if failed, perovskite solar cells could be collected and recycled; reuse of their gold electrodes and transparent conducting glasses could reduce the price per watt of perovskite photovoltaic modules. Herein, we present a simple and effective method for removing the perovskite layer and reusing the mesoporous TiO2-coated transparent conducting glass substrate via selective dissolution. We find that the perovskite layer can be easily decomposed in polar aprotic solvents because of the reaction between polar aprotic solvents and Pb(2+) cations. After 10 cycles of recycling, a mesoporous TiO2-coated transparent conducting glass substrate-based perovskite solar cell still shows a constant power-conversion efficiency, thereby demonstrating the possibility of recycling perovskite solar cells.
大多数钙钛矿太阳能电池的研究都集中在提高能量转换效率和稳定性上。然而，如果能够对钙钛矿太阳能电池进行翻新，其稳定性可能就不是一个关键问题。从成本效益的角度来看，如果电池出现故障，可以将其收集并回收；重复使用其金电极和透明导电玻璃可以降低钙钛矿光伏组件每瓦的价格。在此，我们提出了一种简单有效的方法，通过选择性溶解来去除钙钛矿层并重复使用介孔 TiO2 涂覆的透明导电玻璃基底。我们发现，由于极性非质子溶剂与 Pb(2+)阳离子之间的反应，钙钛矿层可以很容易地在极性非质子溶剂中分解。经过 10 次循环回收后，基于介孔 TiO2 涂覆的透明导电玻璃基底的钙钛矿太阳能电池仍表现出恒定的能量转换效率，从而证明了回收钙钛矿太阳能电池的可能性。
