Elucidating the Trajectory of the Charge Transfer Mechanism and Recombination Process of Hybrid Perovskite Solar Cells.

Autor: Kirui JK; Physics Department, University of Venda, Thohoyandou 0950, South Africa., Olaleru SA; Physics Department, University of Venda, Thohoyandou 0950, South Africa.; CSIR-Energy Centre, Council for Scientific and Industrial Research, P.O. Box 395, Pretoria 0001, South Africa.; DST/CSIR-National Centre for Nano-Structured Materials, P.O. Box 395, Pretoria 0001, South Africa.; Physics Department, Yaba College of Technology, P.M.B 2011, Lagos 100001, Nigeria., Jhamba L; Physics Department, University of Venda, Thohoyandou 0950, South Africa., Wamwangi D; School of Physics and Materials Physics Research Institute, University of the Witwatersrand, Johannesburg 2050, South Africa., Roro K; CSIR-Energy Centre, Council for Scientific and Industrial Research, P.O. Box 395, Pretoria 0001, South Africa., Shnier A; School of Physics and Materials Physics Research Institute, University of the Witwatersrand, Johannesburg 2050, South Africa., Erasmus R; School of Physics and Materials Physics Research Institute, University of the Witwatersrand, Johannesburg 2050, South Africa., Mwakikunga B; DST/CSIR-National Centre for Nano-Structured Materials, P.O. Box 395, Pretoria 0001, South Africa.; Physics Department, Arcadia Campus, Tshwane University of Technology, P.O. Box 680, Pretoria 0001, South Africa.
Jazyk: angličtina
Zdroj: Materials (Basel, Switzerland) [Materials (Basel)] 2021 May 21; Vol. 14 (11). Date of Electronic Publication: 2021 May 21.
DOI: 10.3390/ma14112698
Abstrakt: Perovskite-based solar cells (PSCs) have attracted attraction in the photovoltaic community since their inception in 2009. To optimize the performance of hybrid perovskite cells, a primary and crucial strategy is to unravel the dominant charge transport mechanisms and interfacial properties of the contact materials. This study focused on the charge transfer process and interfacial recombination within the n-i-p architecture of solar cell devices. The motivation for this paper was to investigate the impacts of recombination mechanisms that exist within the interface in order to quantify their effects on the cell performance and stability. To achieve our objectives, we firstly provided a rationale for the photoluminescence and UV-Vis measurements on perovskite thin film to allow for disentangling of different recombination pathways. Secondly, we used the ideality factor and impedance spectroscopy measurements to investigate the recombination mechanisms in the device. Our findings suggest that charge loss in PSCs is dependent mainly on the configuration of the cells and layer morphology, and hardly on the material preparation of the perovskite itself. This was deduced from individual analyses of the perovskite film and device, which suggest that major recombination most likely occur at the interface.
Databáze: MEDLINE
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