Multimodal Microscale Imaging of Textured Perovskite-Silicon Tandem Solar Cells.

Autor:	Tennyson EM; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Frohna K; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Drake WK; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Sahli F; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Chien-Jen Yang T; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Fu F; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Werner J; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Chosy C; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States., Bowman AR; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Doherty TAS; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K., Jeangros Q; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Ballif C; École Polytechnique Fédérale de Lausanne, Photovoltaics and Thin-Film Electronics Laboratory, Neuchatel 2002, CH, Switzerland., Stranks SD; Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE, U.K.; Department of Chemical Engineering & Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
Jazyk:	angličtina
Zdroj:	ACS energy letters [ACS Energy Lett] 2021 Jun 11; Vol. 6 (6), pp. 2293-2304. Date of Electronic Publication: 2021 May 28.
DOI:	10.1021/acsenergylett.1c00568
Abstrakt:	Halide perovskite/crystalline silicon (c-Si) tandem solar cells promise power conversion efficiencies beyond the limits of single-junction cells. However, the local light-matter interactions of the perovskite material embedded in this pyramidal multijunction configuration, and the effect on device performance, are not well understood. Here, we characterize the microscale optoelectronic properties of the perovskite semiconductor deposited on different c-Si texturing schemes. We find a strong spatial and spectral dependence of the photoluminescence (PL) on the geometrical surface constructs, which dominates the underlying grain-to-grain PL variation found in halide perovskite films. The PL response is dependent upon the texturing design, with larger pyramids inducing distinct PL spectra for valleys and pyramids, an effect which is mitigated with small pyramids. Further, optimized quasi-Fermi level splittings and PL quantum efficiencies occur when the c-Si large pyramids have had a secondary smoothing etch. Our results suggest that a holistic optimization of the texturing is required to maximize light in- and out-coupling of both absorber layers and there is a fine balance between the optimal geometrical configuration and optoelectronic performance that will guide future device designs. Competing Interests: The authors declare the following competing financial interest(s): The corresponding author is a co-founder of Swift Solar, Inc. (© 2021 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu