The identification and characterization of defect states in hybrid organic-inorganic perovskite photovoltaics

Hsin Sheng Duan; Huanping Zhou; Qi Chen; Pengyu Sun; Song Luo; Tze Bin Song; Brion Bob; Yang Yang

doi:10.1039/c4cp04479g

The identification and characterization of defect states in hybrid organic-inorganic perovskite photovoltaics

Hsin Sheng Duan, Huanping Zhou, Qi Chen, Pengyu Sun, Song Luo, Tze Bin Song, Brion Bob, Yang Yang^*

^*Corresponding author for this work

University of California

Research output: Contribution to journal › Article › peer-review

350 Citations (Scopus)

Abstract

Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we have characterized and identified the defect energy distribution in the CH₃NH₃PbI₃ perovskite using admittance spectroscopy, which reveals a deep defect state ∼0.16 eV above the valence band. According to theoretical calculations, the defect state is possibly attributed to iodine interstitials (I_i), which can become the non-radiative recombination centers in the absorber.

Original language	English
Pages (from-to)	112-116
Number of pages	5
Journal	Physical Chemistry Chemical Physics
Volume	17
Issue number	1
DOIs	https://doi.org/10.1039/c4cp04479g
Publication status	Published - 7 Jan 2015
Externally published	Yes

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abstract = "Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we have characterized and identified the defect energy distribution in the CH3NH3PbI3 perovskite using admittance spectroscopy, which reveals a deep defect state ∼0.16 eV above the valence band. According to theoretical calculations, the defect state is possibly attributed to iodine interstitials (Ii), which can become the non-radiative recombination centers in the absorber.",

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AU - Duan, Hsin Sheng

AU - Zhou, Huanping

AU - Chen, Qi

AU - Sun, Pengyu

AU - Luo, Song

AU - Song, Tze Bin

AU - Bob, Brion

AU - Yang, Yang

PY - 2015/1/7

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N2 - Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we have characterized and identified the defect energy distribution in the CH3NH3PbI3 perovskite using admittance spectroscopy, which reveals a deep defect state ∼0.16 eV above the valence band. According to theoretical calculations, the defect state is possibly attributed to iodine interstitials (Ii), which can become the non-radiative recombination centers in the absorber.

AB - Thin film photovoltaic cells based on hybrid halide perovskite absorbers have emerged as promising candidates for next generation photovoltaics. Here, we have characterized and identified the defect energy distribution in the CH3NH3PbI3 perovskite using admittance spectroscopy, which reveals a deep defect state ∼0.16 eV above the valence band. According to theoretical calculations, the defect state is possibly attributed to iodine interstitials (Ii), which can become the non-radiative recombination centers in the absorber.

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The identification and characterization of defect states in hybrid organic-inorganic perovskite photovoltaics

Abstract

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