Re-emerging photo responsiveness enhancement under compression in (NH4)2SeBr6

Pressure has an essential role in the control of both the photo-responsive and electrical transport properties of halide perovskites. As a lead-free halide double perovskite material, (NH4)2SeBr6, which avoids the use of a toxic lead element, has become an ideal candidate for application in photovol...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2023-03, Vol.122 (13)
Main Authors: Zhang, Yuzhen, Zhang, Guozhao, Zhang, Haiwa, Ou, Tianji, Wang, Qinglin, Wang, Lingrui, Li, Yinwei, Liu, Cailong
Format: Article
Language:English
Subjects:
Applied physics
Lead free
Perovskites
Photoelectric effect
Photoelectric emission
Photoelectricity
Transport properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Pressure has an essential role in the control of both the photo-responsive and electrical transport properties of halide perovskites. As a lead-free halide double perovskite material, (NH4)2SeBr6, which avoids the use of a toxic lead element, has become an ideal candidate for application in photovoltaic and photoelectric devices. In this paper, the photoelectric response and electrical transport response properties of (NH4)2SeBr6 have been studied by photocurrent and alternating current impedance spectroscopy measurements under high pressure up to 21.2 GPa, respectively. The current results indicate that in (NH4)2SeBr6, a second photo-responsiveness enhancement re-emerges above 11.2 GPa, after the photocurrent drops from the first maximum at 6.5 GPa and reaches the second maximum at 16.4 GPa. The photoelectric response of (NH4)2SeBr6 in phase II is better than that of phase I, and electron conduction rather than ion conduction plays a dominant role in the whole electrical transportation process under compression.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0135599