Inhibition of Zero Drift in Perovskite-Based Photodetector Devices via [6,6]-Phenyl-C61-butyric Acid Methyl Ester Doping

Yintao Liu; Renxu Jia; Yucheng Wang; Ziyang Hu; Yuming Zhang; Tiqiang Pang; Yuejin Zhu; Suzhen Luan

doi:10.1021/acsami.7b02413

Inhibition of Zero Drift in Perovskite-Based Photodetector Devices via [6,6]-Phenyl-C61-butyric Acid Methyl Ester Doping

ACS Appl Mater Interfaces. 2017 May 10;9(18):15638-15643. doi: 10.1021/acsami.7b02413. Epub 2017 Apr 25.

Authors

Yintao Liu¹, Renxu Jia¹, Yucheng Wang¹, Ziyang Hu², Yuming Zhang¹, Tiqiang Pang¹, Yuejin Zhu², Suzhen Luan¹

Affiliations

¹ School of Microelectronics, Xidian University , Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices, Xi'an 710071, China.
² Department of Microelectronic Science and Engineering, Ningbo Collabrative Innovation Center of Nonlinear Harzard System of Ocean and Atmosphere, Ningbo University , Ningbo 315211, China.

PMID: 28429589
DOI: 10.1021/acsami.7b02413

Abstract

Zero drift can severely deteriorate the stability of the light-dark current ratio, detectivity, and responsivity of photodetectors. In this paper, the effects of a [6,6]-phenyl-C61-butyric acid methyl ester (PCBM)-doped perovskite-based photodetector device on the inhibition of zero drift under dark state are discussed. Two kinds of photodetectors (Au/CH₃NH₃PbI_xCl_3-x/Au and Au/CH₃NH₃PbI_xCl_3-x:PCBM/Au) were prepared, and the materials and photodetector devices were measured by scanning electron microscopy, X-ray diffraction, photoluminescence, ultraviolet absorption spectra, and current-voltage and current-time measurements. It was found that similar merit parameters, including light-dark current ratio (∼10²), detectivity (∼10¹¹ Jones), and responsivity were obtained for these two kinds of photodetectors. However, the drift of Au/CH₃NH₃PbI_xCl_3-x:PCBM/Au devices is negligible, while a drift of ∼0.2 V exists in Au/CH₃NH₃PbI_xCl_3-x/Au devices. A new model is proposed based on the hindering theory of ion (vacancy) migration, and it is believed that the dopant PCBM can hinder the ion (vacancy) migration of perovskite materials to suppress the phenomenon of zero drift in perovskite-based photodetectors.

Keywords: [6,6]-phenyl-C61-butyric acid methyl ester; ion migration; perovskite; photodetectors; zero drift.