Low-cost and flexible ultra-thin silicon solar cell implemented with energy-down-shift via Cd0.5Zn0.5S/ZnS core/shell quantum dots

Seung-Wook Baek; Jae-Hyoung Shim; Yun-Hyuk Ko; Jin-Seong Park; Gon-Sub Lee; Mohammed Jalalah; M. S. Al-Assiri; Jea-Gun Park

doi:10.1039/C4TA05004E

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Low-cost and flexible ultra-thin silicon solar cell implemented with energy-down-shift via Cd_0.5Zn_0.5S/ZnS core/shell quantum dots†

Seung-Wook Baek,^a Jae-Hyoung Shim,^a Yun-Hyuk Ko,^a Jin-Seong Park,^a Gon-Sub Lee,^a Mohammed Jalalah,^ab M. S. Al-Assiri^b and Jea-Gun Park*^a

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* Corresponding authors

^a Department of Electronics & Computer Engineering, Hanyang University, Seoul 133-791, Republic of Korea
E-mail: parkjgL@hanyang.ac.kr
Fax: +82 2 2220 1179
Tel: +82 2 2220 0234

^b Promising Center for Sensors and Electronic Devices (PCSED), Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia

Abstract

Flexible ultra-thin silicon (∼30 μm thickness) solar cells implemented with an energy-down-shift layer showed stable flexible and twistable characteristics. In particular, spin-coating Cd_0.5Zn_0.5S/ZnS core/shell quantum dots (QDs) on the cells enhanced the PCE by ∼0.7% through an energy-down-shift effect that enhanced the external quantum efficiency in the UV light region. In addition, the cells demonstrated an excellent bending fatigue performance because their PCE levels were sustained at ∼12.4% after 5000 bending cycles under a strain of ∼5.72%.

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DOI: https://doi.org/10.1039/C4TA05004E
Article type: Communication
Submitted: 22 Sep 2014
Accepted: 08 Nov 2014
First published: 10 Nov 2014

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J. Mater. Chem. A, 2015,3, 481-487

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Low-cost and flexible ultra-thin silicon solar cell implemented with energy-down-shift via Cd_0.5Zn_0.5S/ZnS core/shell quantum dots

S. Baek, J. Shim, Y. Ko, J. Park, G. Lee, M. Jalalah, M. S. Al-Assiri and J. Park, J. Mater. Chem. A, 2015, 3, 481 DOI: 10.1039/C4TA05004E

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Journal of Materials Chemistry A