Ultrasensitive Photodetectors Based on Island-Structured CH3NH3PbI3 Thin Films

详细信息    查看全文

• 作者：Yin Zhang ; Juan Du ; Xiaohan Wu ; Guoqian Zhang ; Yingli Chu ; Dapeng Liu ; Yixin Zhao ; Ziqi Liang ; Jia Huang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：October 7, 2015
• 年：2015
• 卷：7
• 期：39
• 页码：21634-21638
• 全文大小：289K
• ISSN：1944-8252

文摘

CH₃NH₃PbI₃ perovskite-based optoelectronics have attracted intense research interests recently because of their easy fabrication process and high power conversion efficiency. Herein, we report a novel photodetector based on unique CH₃NH₃PbI₃ perovskite films with island-structured morphology. The light-induced electronic properties of the photodetectors were investigated and compared to those devices based on conventional compact CH₃NH₃PbI₃ films. The island-structured CH₃NH₃PbI₃ photodetectors exhibited a rapid response speed (<50 ms), good stability at a temperature of up to 100 掳C, a large photocurrent to dark current ratio (I_light/I_dark > 1 脳 10⁴ under an incident light of 鈭?.59 mW/cm², and I_light/I_dark > 1 脳 10² under low incident light 鈭?.018 mW/cm²), and excellent reproducibility. Especially, the performance of the island-structured devices markedly exceed that of the conventional compact CH₃NH₃PbI₃ thin-film devices. These excellent performances render the island-structured device to be potentially applicable for a wide range of optoelectronics.