CUED Publications database

Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets.

Ahmad, S and Kanaujia, PK and Beeson, HJ and Abate, A and Deschler, F and Credgington, D and Steiner, U and Prakash, GV and Baumberg, JJ (2015) Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets. ACS Appl Mater Interfaces, 7. pp. 25227-25236.

Full text not available from this repository.

Abstract

Room-temperature photocurrent measurements in two-dimensional (2D) inorganic-organic perovskite devices reveal that excitons strongly contribute to the photocurrents despite possessing binding energies over 10 times larger than the thermal energies. The p-type (C6H9C2H4NH3)2PbI4 liberates photocarriers at metallic Schottky aluminum contacts, but incorporating electron- and hole-transport layers enhances the extracted photocurrents by 100-fold. A further 10-fold gain is found when TiO2 nanoparticles are directly integrated into the perovskite layers, although the 2D exciton semiconducting layers are not significantly disrupted. These results show that strong excitonic materials may be useful as photovoltaic materials despite high exciton binding energies and suggest mechanisms to better understand the photovoltaic properties of the related three-dimensional perovskites.

Item Type: Article
Uncontrolled Keywords: exciton photocurrent inorganic−organic hybrid layered perovskite photodetector room-temperature exciton
Subjects: UNSPECIFIED
Divisions: Div E > Manufacturing Systems
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:58
Last Modified: 23 Nov 2017 03:31
DOI: