Li Dong, Dong Guifang, Li Wenzhe, Wang Liduo
Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Sci Rep. 2015 Jan 20;5:7902. doi: 10.1038/srep07902.
Organic-inorganic hybrid photodetectors attract considerable attention because they can combine the advantages of both organic and inorganic systems. Here, a perovskite compound with a broad absorption spectrum and high power conversion efficiency is used as a photosensitive layer in an organic/inorganic hybrid heterojunction photodetector with a high and fast response. The high sensitivity exceeding 10(4) is obtained at bias of 0-4 V. Using a tandem organic light-emitting diode (OLED) as the light source, we fabricated an optocoupler device. The optocoupler achieved a maximum photoresponsivity of 1.0 A W(-1) at 341.3 μWcm(-2) at an input voltage of 6 V. The device also exhibits rapid response times of τ(rise) ~ 20 μs and τ(fall) ~ 17 μs; as well as a high current transfer ratio (CTR) of 28.2%. After applying an amplification circuit, the CTR of the optocoupler increases to 263.3%, which is comparable with that of commercial inorganic optocouplers. The developed hybrid optocoupler thus shows great promise for use in photonics.
有机-无机杂化光电探测器备受关注，因为它们能够结合有机和无机系统的优点。在此，一种具有宽吸收光谱和高功率转换效率的钙钛矿化合物被用作具有高且快速响应的有机/无机杂化异质结光电探测器中的光敏层。在0 - 4 V偏压下获得了超过10⁴的高灵敏度。使用串联有机发光二极管（OLED）作为光源，我们制造了一种光耦合器器件。该光耦合器在输入电压为6 V时，在341.3 μWcm⁻²的光强下实现了1.0 A W⁻¹的最大光响应度。该器件还表现出快速的响应时间，上升时间τ(rise)约为20 μs，下降时间τ(fall)约为17 μs；以及28.2%的高电流传输比（CTR）。应用放大电路后，光耦合器的CTR提高到263.3%，这与商用无机光耦合器相当。因此，所开发的混合光耦合器在光子学领域显示出巨大的应用前景。
