Investigation of boron antimonide as hot carrier absorber material

Yao Yao; Dirk Koenig; Martin Green

doi:10.1016/j.solmat.2012.12.029

Investigation of boron antimonide as hot carrier absorber material

Yao Yao, Dirk Koenig, Martin Green

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

30 Citations (Scopus)

Abstract

Hot carrier solar cells (HCSCs) are a high-efficiency third generation solar cell concept. One major difficulty in realizing HSCSs is the delay of the hot carrier cooling process in their absorber. Bulk boron antimonide (BSb) was investigated with ab initio methods for its potential as hot carrier absorber (HCA). Our calculation results of its phononic structure show that several phonon decay processes are suppressed, leading to a phonon bottleneck and a considerable delay of carrier cooling. Results on its electronic structure reveal a low electron effective mass and an indirect band gap of 0.59 eV. Surprisingly high experimental values of the absorption coefficient near band gap are explained by distinct features of the electronic and phononic band dispersions and provide favorable optical properties for a HCA. (C) 2013 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	123-126
Number of pages	4
Journal	Solar Energy Materials and Solar Cells
Volume	111
DOIs	https://doi.org/10.1016/j.solmat.2012.12.029
Publication status	Published - Apr 2013
Externally published	Yes

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10.1016/j.solmat.2012.12.029

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abstract = "Hot carrier solar cells (HCSCs) are a high-efficiency third generation solar cell concept. One major difficulty in realizing HSCSs is the delay of the hot carrier cooling process in their absorber. Bulk boron antimonide (BSb) was investigated with ab initio methods for its potential as hot carrier absorber (HCA). Our calculation results of its phononic structure show that several phonon decay processes are suppressed, leading to a phonon bottleneck and a considerable delay of carrier cooling. Results on its electronic structure reveal a low electron effective mass and an indirect band gap of 0.59 eV. Surprisingly high experimental values of the absorption coefficient near band gap are explained by distinct features of the electronic and phononic band dispersions and provide favorable optical properties for a HCA. (C) 2013 Elsevier B.V. All rights reserved.",

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AU - Yao, Yao

AU - Koenig, Dirk

AU - Green, Martin

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AB - Hot carrier solar cells (HCSCs) are a high-efficiency third generation solar cell concept. One major difficulty in realizing HSCSs is the delay of the hot carrier cooling process in their absorber. Bulk boron antimonide (BSb) was investigated with ab initio methods for its potential as hot carrier absorber (HCA). Our calculation results of its phononic structure show that several phonon decay processes are suppressed, leading to a phonon bottleneck and a considerable delay of carrier cooling. Results on its electronic structure reveal a low electron effective mass and an indirect band gap of 0.59 eV. Surprisingly high experimental values of the absorption coefficient near band gap are explained by distinct features of the electronic and phononic band dispersions and provide favorable optical properties for a HCA. (C) 2013 Elsevier B.V. All rights reserved.

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VL - 111

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JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

ER -

Investigation of boron antimonide as hot carrier absorber material

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