Hierarchical Nanostructures CuBiO Integrated with Polyaniline Nanofibrous for Boosting Hole Extraction in Carbon-Based Perovskite Solar Cells.

ACS Appl Mater Interfaces

Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering, Xinjiang University, Urumqi 830017, P. R. China.

Published: October 2024

Toward commercialization of carbon-based perovskite solar cells (C-PSCs), it is crucial to innovatively design inorganic hole transport layer materials that excel in extracting and transporting charge carriers to promote their photoelectric conversion efficiency (PCE). In this work, a novel and high-connectivity CuBiO-polyaniline nanofibrous (CuBiO-PN) reticular structure is created by integrating CuBiO hierarchical microspheres (CuBiO MS) with polyaniline nanofibrous. The introduction of CuBiO-PN as a hole transport layer (HTL) notably enhances the contact quality of the devices and substantially reduces the surface defects of C-PSCs. In a comparative analysis under identical experimental conditions, MAPbI devices incorporating CuBiO-PN HTL demonstrated a PCE of 14.79%, achieving a 44.3% increase over the reference device (10.25%). CuBiO-treated C-PSCs retained 89.9% of their original PCE after 45 days in storage, and they demonstrated improved stability over a longer time frame. This remarkable improvement in device performance can be attributed to the effective suppression of nonradiative recombination and the enhancement of the carrier transfer process in the device. Additionally, the unique interconnected reticular structure of CuBiO-PN provides efficient pathways for hole transfer, significantly contributing to the enhanced efficiency of the device.

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Source
http://dx.doi.org/10.1021/acsami.4c13558DOI Listing

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