Semi-Transparent, Chiral Organic Photodiodes with Incident Direction-Dependent Selectivity for Circularly Polarized Light

Lixuan Liu; Zhixiang Wei; Stefan C.J. Meskers

doi:10.1002/adma.202209730

Semi-Transparent, Chiral Organic Photodiodes with Incident Direction-Dependent Selectivity for Circularly Polarized Light

Lixuan Liu
, Zhixiang Wei (Corresponding author)
, Stefan C.J. Meskers

ICMS Core member

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

27 Citations (Scopus)

94 Downloads (Pure)

Abstract

Detection of the circular polarization of light is possible using chiral semiconductors, yet the mechanisms remain poorly understood. Semi-transparent chiral photodiodes allow for a simple experiment to investigate the basis of their selectivity: changing the side from which the diode is illuminated. A reversal of circular selectivity is observed in photocurrent generation when changing the direction of illumination on organic, bulk-heterojunction cells. The change in selectivity can be explained by a space-charge limitation on the collection of photocarriers in combination with preferential absorption of one of the circular polarizations of near-infrared light by the chiral non-fullerene acceptor. The space-charge limitation is supported by detailed measurements of frequency and intensity dependence of dc and ac photocurrents.

Original language	English
Article number	2209730
Number of pages	8
Journal	Advanced Materials
Volume	35
Issue number	10
DOIs	https://doi.org/10.1002/adma.202209730
Publication status	Published - 9 Mar 2023

Bibliographical note

Funding Information:
The authors acknowledge the financial support from the Ministry of Science and Technology of China (grant no. 2021YFA1200303), the National Natural Science Foundation of China (grant nos. 21721002 and 22135001), the Strategic Priority Research Program of Chinese Academy of Sciences (no. XDB36000000), and the China Scholarship Council (202104910462). The authors thank T. van der Pol for help with device fabrication and W. van Geel for assistance with impedance measurements.

Funding

The authors acknowledge the financial support from the Ministry of Science and Technology of China (grant no. 2021YFA1200303), the National Natural Science Foundation of China (grant nos. 21721002 and 22135001), the Strategic Priority Research Program of Chinese Academy of Sciences (no. XDB36000000), and the China Scholarship Council (202104910462). The authors thank T. van der Pol for help with device fabrication and W. van Geel for assistance with impedance measurements.

Keywords

bulk-heterojunctions
circularly polarized light detection
semi-transparent photodiodes
space-charge limited photocurrents

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title = "Semi-Transparent, Chiral Organic Photodiodes with Incident Direction-Dependent Selectivity for Circularly Polarized Light",

abstract = "Detection of the circular polarization of light is possible using chiral semiconductors, yet the mechanisms remain poorly understood. Semi-transparent chiral photodiodes allow for a simple experiment to investigate the basis of their selectivity: changing the side from which the diode is illuminated. A reversal of circular selectivity is observed in photocurrent generation when changing the direction of illumination on organic, bulk-heterojunction cells. The change in selectivity can be explained by a space-charge limitation on the collection of photocarriers in combination with preferential absorption of one of the circular polarizations of near-infrared light by the chiral non-fullerene acceptor. The space-charge limitation is supported by detailed measurements of frequency and intensity dependence of dc and ac photocurrents.",

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AU - Wei, Zhixiang

AU - Meskers, Stefan C.J.

N1 - Funding Information: The authors acknowledge the financial support from the Ministry of Science and Technology of China (grant no. 2021YFA1200303), the National Natural Science Foundation of China (grant nos. 21721002 and 22135001), the Strategic Priority Research Program of Chinese Academy of Sciences (no. XDB36000000), and the China Scholarship Council (202104910462). The authors thank T. van der Pol for help with device fabrication and W. van Geel for assistance with impedance measurements.

PY - 2023/3/9

Y1 - 2023/3/9

N2 - Detection of the circular polarization of light is possible using chiral semiconductors, yet the mechanisms remain poorly understood. Semi-transparent chiral photodiodes allow for a simple experiment to investigate the basis of their selectivity: changing the side from which the diode is illuminated. A reversal of circular selectivity is observed in photocurrent generation when changing the direction of illumination on organic, bulk-heterojunction cells. The change in selectivity can be explained by a space-charge limitation on the collection of photocarriers in combination with preferential absorption of one of the circular polarizations of near-infrared light by the chiral non-fullerene acceptor. The space-charge limitation is supported by detailed measurements of frequency and intensity dependence of dc and ac photocurrents.

AB - Detection of the circular polarization of light is possible using chiral semiconductors, yet the mechanisms remain poorly understood. Semi-transparent chiral photodiodes allow for a simple experiment to investigate the basis of their selectivity: changing the side from which the diode is illuminated. A reversal of circular selectivity is observed in photocurrent generation when changing the direction of illumination on organic, bulk-heterojunction cells. The change in selectivity can be explained by a space-charge limitation on the collection of photocarriers in combination with preferential absorption of one of the circular polarizations of near-infrared light by the chiral non-fullerene acceptor. The space-charge limitation is supported by detailed measurements of frequency and intensity dependence of dc and ac photocurrents.

KW - bulk-heterojunctions

KW - circularly polarized light detection

KW - semi-transparent photodiodes

KW - space-charge limited photocurrents

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Semi-Transparent, Chiral Organic Photodiodes with Incident Direction-Dependent Selectivity for Circularly Polarized Light

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Keywords

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