Screen printing large-area organometal halide perovskite thin films for efficient photodetectors
Screen printing large-area organometal halide perovskite thin films for efficient photodetectors
复制标题
丝网印刷大面积有机金属卤化物钙钛矿薄膜用于高效光电探测器
DOI：
10.1016/j.materresbull.2017.10.039
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发表时间：
2018-02-01
影响因子：
5.4
通讯作者：
Li, Xing'ao
中科院分区：
文献类型：
--
作者：
Chu, Liang;Hu, Ruiyuan;Li, Xing'ao
与传统的光电材料相比，有机金属卤化物钙钛矿已经表现出优异的特性。迄今为止，钙钛矿膜通常通过旋涂或气相沉积来制造。然而，这两种方法不能同时满足大规模和低成本的生产。本文提出了一种简单、低成本、高通量的方法来制备钙钛矿薄膜，并将其进一步应用于光电探测器。首先，采用溶剂沉淀法合成了铅化合物纳米粒子，然后丝网印刷了含有铅化合物纳米粒子的浆料，通过煅烧形成PbO薄膜，再将PbO薄膜直接与CH3NH3I溶液反应生成CH3NH3PbI3薄膜。CH_3NH_3PbI_3薄膜由微米晶体组成，通过调节CH_3NH_3I浓度可以有效地控制其尺寸。此外，将该薄膜应用于光电探测器中，显示出高灵敏度和快速响应的良好性能。
Organometal halide perovskites have demonstrated excellent features compared to conventional optoelectronic materials. To date, the perovskite films have generally been fabricated by either spin coating or vapor deposition. However, both methods cannot simultaneously meet large scale and low cost of production. Here, a simple, low-cost and high-throughput strategy was proposed to fabricate perovskite thin films, which were further applied in photodetectors. First, lead compound nanoparticles were synthesized by a solvent precipitation method, then a paste with the lead compound nanoparticles was screen printed to form PbO films involving calcination, and next the PbO films directly reacted with CH3NH3I solution to convert into CH3NH3PbI3 films. The CH3NH3PbI3 films consisted of micron crystals, whose sizes can be effectively controlled by adjusting CH3NH3I concentration. Furthermore, the CH3NH3PbI3 films were applied in photodetectors, which showed good performance with high sensitivity and fast response.