Contactless Determination of Optimal Chloride Concentration for Power Conversion Efficiency in CH3NH3Pb(Cl,I)3 Using Photoluminescence Spectroscopy

Takaho Asai; Seigo Ito; Takayuki Makino

doi:10.3390/photonics8100412

Photonics (Sep 2021)

Contactless Determination of Optimal Chloride Concentration for Power Conversion Efficiency in CH3NH3Pb(Cl,I)3 Using Photoluminescence Spectroscopy

Takaho Asai,
Seigo Ito,
Takayuki Makino

Affiliations

Takaho Asai: Department of Electric and Electronics Engineering, University of Fukui, Fukui 910-8507, Japan
Seigo Ito: Department of Materials and Synchrotron Radiation Engineering, University of Hyogo, Himeji 671-2280, Japan
Takayuki Makino: Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan

DOI: https://doi.org/10.3390/photonics8100412
Journal volume & issue: Vol. 8, no. 10
p. 412

Abstract

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We applied room-temperature photoluminescence (PL) spectroscopy for the compositional engineering of a CH3NH3Pb(Cl,I)3 light harvester in an alloy-based perovskite solar cell. This spectroscopic characterization determines the optimal Cl concentration where the power conversion efficiency shows its maximum in a contactless and non-destructive manner. The PL quenching ratio evaluated from the comparative PL studies between the films grown on glass/ZrO2 and SnO2:F/TiO2 substrates exhibited its maximum at a Cl concentration of 10 mol%, which agrees with the Cl concentration determined from the current–voltage measurement-based device performance. We also discuss the possible reasons for the coincidence mentioned above regarding the charge extraction effect induced by Cl incorporation.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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