Effects of the indium tin oxide/perovskite interface on the photocurrent amplification of perovskite photodetectors

doi:10.1016/j.synthmet.2020.116636

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	Effects of the indium tin oxide/perovskite interface on the photocurrent amplification of perovskite photodetectors
	L. Wang; Z. Su; H. Wu and B. Chu
	2021
发表期刊	Synthetic Metals
ISSN	3796779
卷号	271
摘要	Perovskite photodetectors processing a photocurrent amplification have attracted much attention due to their high response to light illumination and have been exploited in a regular device geometry. Here, photocurrent amplification is demonstrated in an inverted perovskite photodetector, and the effect of the indium tin oxide (ITO)/perovskite interface on the photocurrent amplification factor are exploited. It is found that the photocurrent amplification is limited by the ITO/perovskite interface, which can be proved by the devices with bare ITO, Cu2O particles partially covered ITO, and poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) fully covered ITO as the anodes. A photocurrent amplification factor of about 27 is demonstrated in the perovskite photodetector with a bare ITO as the anode, which is one of the highest ones among the reported perovskite photodetectors. It also exhibits a maximum response of 4.1 A/W and a detectivity of 1011 Jones. Compared with the bare ITO device, the photocurrent amplification of the devices decreases gradually with the reduced contact area between ITO and perovskite and eventually disappears when the direct contact is totally removed. The photocurrent amplification is attributed to the long-lived accumulated holes as well as the positively charged CH3NH3+ and I vacancy at the ITO/perovskite interface, which dramatically lowers the injection barrier of electrons and leads to a multiple electron injection. 2020
DOI	10.1016/j.synthmet.2020.116636
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65199
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. Wang,Z. Su,H. Wu and B. Chu. Effects of the indium tin oxide/perovskite interface on the photocurrent amplification of perovskite photodetectors[J]. Synthetic Metals,2021,271.
APA	L. Wang,Z. Su,&H. Wu and B. Chu.(2021).Effects of the indium tin oxide/perovskite interface on the photocurrent amplification of perovskite photodetectors.Synthetic Metals,271.
MLA	L. Wang,et al."Effects of the indium tin oxide/perovskite interface on the photocurrent amplification of perovskite photodetectors".Synthetic Metals 271(2021).

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