Journal
ORGANIC ELECTRONICS
Volume 98, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.orgel.2021.106298
Keywords
Inverted perovskite solar cells; PEDOT/PSS; Potassium chloride; Defect passivation; Charge carrier recombination
Funding
- Doctoral Scientific Research Foundation of Xinyang Normal University
- Key Project of Henan Province Colleges and Universities Plan [19A430022]
- Natural Science Foundation of Henan Province [202300410334]
- Nanhu Scholars Program for Young Scholars of XYNU
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The KCl modified PEDOT:PSS film enhances the performance of inverted perovskite solar cells by promoting crystallization, enlarging crystals, and effectively passivating defects, leading to a significant increase in power conversion efficiency.
PEDOT:PSS is one of the most widely used hole transporting layer for inverted perovskite solar cells. Yet the performances of the corresponding perovskite solar cells are not satisfactory. Here, we demonstrate that KCl modified PEDOT:PSS film can promote the crystallization of perovskite film and enlarge the perovskite crystals. At the same time, KCl can diffuse into the perovskite film and effectively passivate the defects. As a result, inverted perovskite solar cells fabricated on 10 mg mL(-1) PEDOT:PSS/KCl films exhibit an average power conversion efficiency of 16.24 %, which is enhanced by 17.77 % compared with the reference perovskite solar cells. Open circuit voltage of 1.009 V and power conversion efficiency of 17.09 % have also been demonstrated using the optimized 10 mg mL(-1) PEDOT:PSS/KCl films.
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