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Issue 7, 2017
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Strategic review of interface carrier recombination in earth abundant Cu–Zn–Sn–S–Se solar cells: current challenges and future prospects

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Abstract

Earth abundant Cu–Zn–Sn–S–Se (CZTSSe) is considered as a promising material for large area and cost effective solar energy harvesting. The current efficiency of CZTSSe champion solar cell, ∼12.7%, is much lower than that of its counterpart Cu–In–Ga–Se (CIGS) solar cell, ∼22.6%, and its theoretically predicted Shockley–Queisser (SQ) limit, ∼32%. This performance disparity is because of a large voltage deficit, ∼0.62 V, in comparison to the optical band gap that primarily results from high carrier recombination at the charge extraction interfaces. The different physical and chemical properties of interfacial layers often cause unfavorable band alignment and interfacial states that lead to high carrier recombination and eventually result in lower device efficiency. To obtain new insights about interfaces and to overcome the interface-related pitfalls, research on interface engineering of solar cells is rapidly accelerating and proven beneficial to achieve better device efficiency. This work provides a detailed strategic review on carrier transport and carrier recombination mechanisms by probing different interfaces of Mo/CZTSSe/CdS/i-ZnO/Al–ZnO/Al through every possible aspect. This review proposes eccentric approaches of carrier management.

Graphical abstract: Strategic review of interface carrier recombination in earth abundant Cu–Zn–Sn–S–Se solar cells: current challenges and future prospects

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Article information


Submitted
08 Dec 2016
Accepted
03 Jan 2017
First published
03 Jan 2017

J. Mater. Chem. A, 2017,5, 3069-3090
Article type
Review Article

Strategic review of interface carrier recombination in earth abundant Cu–Zn–Sn–S–Se solar cells: current challenges and future prospects

K. Kaur, N. Kumar and M. Kumar, J. Mater. Chem. A, 2017, 5, 3069
DOI: 10.1039/C6TA10543B

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