Details

Autor(en) / Beteiligte

• Wang, Ye
• Song, Qiaogang
• Lin, Tong
• Fu, Yue
• Sun, Xue
• Chu, Bei
• Jin, Fangming
• Zhao, Haifeng
• Li, Wenlian
• Su, Zisheng
• Li, Yantao

Titel

Improved performance of CH3NH3PbI3 based photodetector with a MoO3 interface layer

Ist Teil von

• Organic electronics, 2017-10, Vol.49, p.355-359

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Link zum Volltext

Quelle

ScienceDirect Journals (5 years ago - present)

Beschreibungen/Notizen

• Planar CH3NH3PbI3 perovskite based photodetectors are fabricated by a facile and low-cost one-step method. The devices show broad spectral photoresponse from the ultraviolet to whole visible region and the performance can be significantly improved by the introduction of a bipolar transporting MoO3 interface layer between CH3NH3PbI3 film and Au electrode. The photocurrent of the device with an optimized MoO3 layer is about twice that of the reference device without MoO3 layer, which results in a high ON/OFF current ratio of 5.9 × 103 at 5 V. Besides, slightly increased photoresponse speed is also found in the optimized device with rise time and decay time of 21.6 and 9.9 ms, respectively. The improvement can be attributed to the improved hole and electron collection efficiency and the quickly filled in or emptied trap states at the CH3NH3PbI3/Au interface due to the introduction of the bipolar transporting MoO3 layer. [Display omitted] •MoO3 layer is introduced to planar CH3NH3PbI3 photodetector.•Perovskite/electrode contact can be modified by MoO3 layer.•The optimized device achieves a two times ON/OFF ratio compared with the reference device.•The rise and decay time reduce to 21.6 and 9.9 ms, respectively.