With the consideration of photon recycling effect, the efficiency limit of methylammonium lead iodide (CH3NH3PbI3) perovskite solar cells is predicted by a detailed balance model. To obtain convincing predictions, both AM 1.5 spectrum of Sun and experimentally measured complex refractive index of perovskite material are employed in the detailed balance model. The roles of light trapping and angular restriction in improving the maximal output power of thin-film perovskite solar cells are also clarified. The efficiency limit of perovskite cells (without the angular restriction) is about 31%, which approaches to Shockley-Queisser limit (33%) achievable by gallium arsenide (GaAs) cells. Moreover, the Shockley-Queisser limit could be reached with a 200 nm-thick perovskite solar cell, through integrating a wavelength-dependent angular-restriction design with a textured light-trapping structure. Additionally, the influence of the trap-assisted nonradiative recombination on the device efficiency is investigated. The work is fundamentally important to high-performance perovskite photovoltaics.
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1 June 2015
Research Article|
June 02 2015
The efficiency limit of CH3NH3PbI3 perovskite solar cells
Wei E. I. Sha
;
Wei E. I. Sha
1Department of Electrical and Electronic Engineering,
The University of Hong Kong
, Pokfulam Road, Hong Kong, China
2
The University of Hong Kong Shenzhen Institute of Research and Innovation (HKU-SIRI)
, Shenzhen 518057, China
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Xingang Ren;
Xingang Ren
1Department of Electrical and Electronic Engineering,
The University of Hong Kong
, Pokfulam Road, Hong Kong, China
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Luzhou Chen;
Luzhou Chen
1Department of Electrical and Electronic Engineering,
The University of Hong Kong
, Pokfulam Road, Hong Kong, China
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Wallace C. H. Choy
Wallace C. H. Choy
a)
1Department of Electrical and Electronic Engineering,
The University of Hong Kong
, Pokfulam Road, Hong Kong, China
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a)
Electronic mail: chchoy@eee.hku.hk
Appl. Phys. Lett. 106, 221104 (2015)
Article history
Received:
March 28 2015
Accepted:
May 25 2015
Citation
Wei E. I. Sha, Xingang Ren, Luzhou Chen, Wallace C. H. Choy; The efficiency limit of CH3NH3PbI3 perovskite solar cells. Appl. Phys. Lett. 1 June 2015; 106 (22): 221104. https://doi.org/10.1063/1.4922150
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