Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology , Wuhan University , Wuhan 430072 , P. R. China.
Shenzhen Institue , Wuhan University , Shenzhen 518055 , P. R. China.
ACS Appl Mater Interfaces. 2019 Oct 30;11(43):39875-39881. doi: 10.1021/acsami.9b12799. Epub 2019 Oct 16.
Formamidinium lead trihalide perovskites have emerged as promising photovoltaic materials owing to their superior absorption coefficient properties. However, one big challenge is the material phase stability and thermal stability at high temperature. In this work, a large quantity of rubidium (Rb) ions is incorporated into formamidinium (FA) perovskite thin films to improve the material phase stability and thermal stability. Photodiodes based on optimized FARbPbI perovskites deliver a high responsivity of 0.43 A W, a detectivity of >10 Jones, a relatively large linear dynamic range of 125 dB, and an ultrafast response speed of approximately 300 ns. Moreover, these photodiodes present lower dark current and higher photocurrent after baking at high temperature. These results are very promising for photodetection at high operational temperature. In addition, the high-ratio rubidium-incorporated perovskite films may have great potential in fabricating other high-performance optoelectronic devices, i.e., light-emitting diodes and solar cells with excellent phase stability and high temperature thermostability.
甲脒碘化铅三卤化物钙钛矿由于其优异的吸收系数性能，已成为很有前途的光伏材料。然而，一个大的挑战是材料相稳定性和高温下的热稳定性。在这项工作中，大量的铷（Rb）离子被掺入到甲脒（FA）钙钛矿薄膜中，以提高材料相稳定性和热稳定性。基于优化的 FARbPbI 钙钛矿的光电二极管实现了 0.43 A W 的高光响应度、>10 琼斯的探测率、相对较大的 125 dB 的线性动态范围和约 300 ns 的超快响应速度。此外，这些光电二极管在高温烘烤后具有更低的暗电流和更高的光电流。这些结果对于高温工作条件下的光电探测非常有前景。此外，高比例铷掺入的钙钛矿薄膜在制造其他高性能光电设备方面可能具有很大的潜力，例如具有优异相稳定性和高温热稳定性的发光二极管和太阳能电池。
Zotero 插件