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Highly efficient flexible hybrid nanocrystal-Cu(In,Ga)Se2(CIGS) solar cells

Highly efficient flexible hybrid nanocrystal-Cu(In,Ga)Se2(CIGS) solar cells
Highly efficient flexible hybrid nanocrystal-Cu(In,Ga)Se2(CIGS) solar cells
A novel scheme for hybridizing inkjet-printed thin film Cu(In,Ga)Se2 (CIGS) solar cells with self-assembled clusters of nanocrystal quantum dots (NQDs), which provides a 10.9% relative enhancement of the photon conversion efficiency (PCE), is demonstrated. A non-uniform layer of NQD aggregates is deposited between the transparent conductive oxide and a CdS/CIGS p-n junction using low cost pulsed-spray deposition. Hybridization significantly improves the external quantum efficiency of the hybrid devices in the absorption range of the NQDs and in the red to near-IR parts of the spectrum. The low wavelength response enhancement is found to be induced by luminescent down-shifting (LDS) from the NQD layer, while the increase at longer wavelengths is attributed to internal scattering from NQD aggregates. LDS is demonstrated using time-resolved spectroscopy, and the morphology of the NQD layer is investigated in fluorescence microscopy and cross-sectional transmission electron microscopy. The influence of the NQD dose on the PCE of the hybrid devices is investigated and an optimum value is obtained. The low costs and limited material consumptions associated with pulsed-spray deposition make these flexible hybrid devices promising candidates to help push thin-film photovoltaic technology towards grid parity.
1614-6832
Liao, Yu-Kuang
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Brossard, Mael
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Hsieh, Dan-Hua
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Lin, Tzu-Neng
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Charlton, Martin
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Cheng, Shun-Jen
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Chen, Chyong-Hua
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Shen, Ji-Lin
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Cheng, Lung-Teng
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Hsieh, Tung-Po
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Lai, Fang-I
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Kuo, Shou-Yi
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Kuo, Hao-Chung
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Savvidis, Pavlos G.
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Lagoudakis, Pavlos G.
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Liao, Yu-Kuang
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Brossard, Mael
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Hsieh, Dan-Hua
f5aa775b-cab0-475e-b2fa-174866b931a0
Lin, Tzu-Neng
c6ed243e-dd40-47eb-b9d8-f209bda32252
Charlton, Martin
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Cheng, Shun-Jen
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Chen, Chyong-Hua
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Shen, Ji-Lin
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Cheng, Lung-Teng
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Hsieh, Tung-Po
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Lai, Fang-I
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Kuo, Shou-Yi
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Kuo, Hao-Chung
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Savvidis, Pavlos G.
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Lagoudakis, Pavlos G.
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Liao, Yu-Kuang, Brossard, Mael, Hsieh, Dan-Hua, Lin, Tzu-Neng, Charlton, Martin, Cheng, Shun-Jen, Chen, Chyong-Hua, Shen, Ji-Lin, Cheng, Lung-Teng, Hsieh, Tung-Po, Lai, Fang-I, Kuo, Shou-Yi, Kuo, Hao-Chung, Savvidis, Pavlos G. and Lagoudakis, Pavlos G. (2015) Highly efficient flexible hybrid nanocrystal-Cu(In,Ga)Se2(CIGS) solar cells. Advanced Energy Materials, 5 (2), [1401280]. (doi:10.1002/aenm.201401280).

Record type: Article

Abstract

A novel scheme for hybridizing inkjet-printed thin film Cu(In,Ga)Se2 (CIGS) solar cells with self-assembled clusters of nanocrystal quantum dots (NQDs), which provides a 10.9% relative enhancement of the photon conversion efficiency (PCE), is demonstrated. A non-uniform layer of NQD aggregates is deposited between the transparent conductive oxide and a CdS/CIGS p-n junction using low cost pulsed-spray deposition. Hybridization significantly improves the external quantum efficiency of the hybrid devices in the absorption range of the NQDs and in the red to near-IR parts of the spectrum. The low wavelength response enhancement is found to be induced by luminescent down-shifting (LDS) from the NQD layer, while the increase at longer wavelengths is attributed to internal scattering from NQD aggregates. LDS is demonstrated using time-resolved spectroscopy, and the morphology of the NQD layer is investigated in fluorescence microscopy and cross-sectional transmission electron microscopy. The influence of the NQD dose on the PCE of the hybrid devices is investigated and an optimum value is obtained. The low costs and limited material consumptions associated with pulsed-spray deposition make these flexible hybrid devices promising candidates to help push thin-film photovoltaic technology towards grid parity.

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e-pub ahead of print date: 22 September 2014
Published date: 21 January 2015
Organisations: Nanoelectronics and Nanotechnology

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Local EPrints ID: 402576
URI: http://eprints.soton.ac.uk/id/eprint/402576
ISSN: 1614-6832
PURE UUID: 860430f8-2973-455d-aa79-53255ab7c002

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Date deposited: 11 Nov 2016 15:22
Last modified: 14 May 2020 16:47

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Contributors

Author: Yu-Kuang Liao
Author: Mael Brossard
Author: Dan-Hua Hsieh
Author: Tzu-Neng Lin
Author: Martin Charlton
Author: Shun-Jen Cheng
Author: Chyong-Hua Chen
Author: Ji-Lin Shen
Author: Lung-Teng Cheng
Author: Tung-Po Hsieh
Author: Fang-I Lai
Author: Shou-Yi Kuo
Author: Hao-Chung Kuo
Author: Pavlos G. Savvidis

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