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Dahiru Sanni1 2 3 Aditya Yerramilli3 Yuanqing Chen1 Joseph Asare4 Esidor Nstoenzok5 Terry Alford3

1, African University of Science and Technology, Abuja, , Nigeria
2, Federal University Dutsinma, Dutsinma, , Nigeria
3, Arizona State University, Tempe, Arizona, United States
4, Baze, Abuja, , Nigeria
5, CEMHTI-CNRS Site Cyclotron 3A, Orleans, , France

The highest power conversion efficiency (PCE) of perovskite solar cells (PSCs) employed the regular (n-i-p) architecture which has PCE of over 22%, but this is achieved by a thick layer of mesoporous TiO2 which require high-temperature post-deposition annealing. In this work, we employed the inverted planar (n-i-p) perovskite solar cell architecture using a low-temperature annealing process. The hole transport layer is poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT: PSS); methylammonium iodide (MAI) and dehydrated lead acetate were the precursor materials for the perovskite layer and phenyl –C61-butyric acid methyl ester (PCBM) as the electron transport layer. In this work, we vary the concentrations of the methylammonium iodide and dehydrated lead acetate and we also investigated the effect of post-deposition annealing temperature of the perovskite active layer on the photovoltaic performance. We obtained power conversion efficiency (PCE) over 12% at annealing temperatures lower than 100oC.

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