Bae Soohyun, Kim Seongtak, Lee Sang-Won, Cho Kyung Jin, Park Sungeun, Lee Seunghun, Kang Yoonmook, Lee Hae-Seok, Kim Donghwan
Department of Materials Science and Engineering, Korea University , Seongbuk-gu, Anam-dong, 136-713 Seoul, Korea.
Department of Solar Cells - Development and Characterization, Fraunhofer Institute for Solar Energy Systems ISE , Heidenhofstr. 2, 79110 Freiburg, Germany.
J Phys Chem Lett. 2016 Aug 18;7(16):3091-6. doi: 10.1021/acs.jpclett.6b01176. Epub 2016 Jul 29.
Perovskite solar cells have great potential for high efficiency generation but are subject to the impact of external environmental conditions such as humidity, UV and sun light, temperature, and electric fields. The long-term stability of perovskite solar cells is an important issue for their commercialization. Various studies on the stability of perovskite solar cells are currently being performed; however, the stability related to electric fields is rarely discussed. Here the electrical stability of perovskite solar cells is studied. Ion migration is confirmed using the temperature-dependent dark current decay. Changes in the power conversion efficiency according to the amount of the external bias are measured in the dark, and a significant drop is observed only at an applied voltage greater than 0.8 V. We demonstrate that perovskite solar cells are stable under an electric field up to the operating voltage.
钙钛矿太阳能电池在高效发电方面具有巨大潜力，但会受到湿度、紫外线、太阳光、温度和电场等外部环境条件的影响。钙钛矿太阳能电池的长期稳定性是其商业化的一个重要问题。目前正在对钙钛矿太阳能电池的稳定性进行各种研究；然而，与电场相关的稳定性很少被讨论。在此，对钙钛矿太阳能电池的电稳定性进行了研究。利用与温度相关的暗电流衰减确认了离子迁移。在黑暗中测量了根据外部偏置量变化的功率转换效率，仅在施加电压大于0.8 V时观察到显著下降。我们证明，钙钛矿太阳能电池在高达工作电压的电场下是稳定的。
