期刊
SOLAR ENERGY
卷 231, 期 -, 页码 716-731出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2021.11.029
关键词
Two-terminal tandem; Optoelectronic model; Perovskite solar cells; Loss analysis; Bifacial operation
资金
- NUS
- National Research Foundation Singapore (NRF)
- Energy Market Authority of Singapore (EMA)
- Singapore Economic Development Board (EDB)
An optoelectronic model for a two-terminal all-perovskite tandem solar cell is developed, and the performance of the cell is investigated by adjusting layer thicknesses, increasing carrier mobility, and reducing recombination loss. The model achieves a power conversion efficiency of 30.5%.
We develop an optoelectronic model for a two-terminal all-perovskite tandem solar cell comprising a top cell, a bottom cell, and a recombination junction in between that connects the two sub-cells in series electrically. In short, the model considers incoherent and coherent light propagation in the glass and thin-film layers respectively, as well as charge carrier transport, generation, and recombination. After calibrating the model to the state of the art two-terminal all-perovskite tandem solar cell with an efficiency of 24.5%, we first study the current matching behavior and S-shaped current-voltage curve of this tandem cell due to the recombination junction. Next, the light interference effect is investigated. Layer thicknesses are adjusted to increase the short circuit current. From a loss analysis, the leading order recombination channels are the surface and Shockley-Read-Hall recombinations. Moreover, we show that the power conversion efficiency of this calibrated tandem model can reach 30.5% by adjusting the layer thicknesses, increasing carrier mobility, and reducing recombination loss. Finally, after switching to bifacial operation, the model predicts a power conversion efficiency of around 35%.
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