High irradiance performance of metal halide perovskites for concentrator photovoltaics

Zhiping Wang, Qianqian Lin, Bernard Wenger, M. Greyson Christoforo, Yen-Hung Lin, Matthew T. Klug, Michael B. Johnston, Laura M. Herz and Henry J. Snaith ()
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Zhiping Wang: University of Oxford
Qianqian Lin: University of Oxford
Bernard Wenger: University of Oxford
M. Greyson Christoforo: University of Oxford
Yen-Hung Lin: University of Oxford
Matthew T. Klug: University of Oxford
Michael B. Johnston: University of Oxford
Laura M. Herz: University of Oxford
Henry J. Snaith: University of Oxford

Nature Energy, 2018, vol. 3, issue 10, 855-861

Abstract: Abstract Traditionally, III–V multi-junction cells have been used in concentrator photovoltaic (CPV) applications, which deliver extremely high efficiencies but have failed to compete with ‘flat-plate’ silicon technologies owing to cost. Here, we assess the feasibility of using metal halide perovskites for CPVs, and we evaluate their device performance and stability under concentrated light. Under simulated sunlight, we achieve a peak efficiency of 23.6% under 14 Suns (that is, 14 times the standard solar irradiance), as compared to 21.1% under 1 Sun, and measure 1.26 V open-circuit voltage under 53 Suns, for a material with a bandgap of 1.63 eV. Importantly, our encapsulated devices maintain over 90% of their original efficiency after 150 h aging under 10 Suns at maximum power point. Our work reveals the potential of perovskite CPVs, and may lead to new PV deployment strategies combining perovskites with low-concentration factor and lower-accuracy solar tracking systems.

Date: 2018
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DOI: 10.1038/s41560-018-0220-2

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