journal article·2024-12-19

Elucidating the Impact of Buried Interface Engineering on Perovskite Properties and Stability in Inverted Perovskite Solar Cells

Bowei Li, Weidong Xu, Wan-Zhen Hsieh, Dongtao Liu, Yuren Xiang, Qing Lian, Hui Li, S. Ravi P. Silva, Wei Zhang, Yixin Zhao

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Abstract

Buried-interface engineering is crucial in the fabrication of perovskite solar cells (PSCs) due to its effectiveness in facilitating the deposition of perovskite absorbers. This technique is especially significant in inverted PSCs (IPSCs) where the dewetting materials are normally used as the bottom hole transporters. Here, we investigate the impact of buried-interface techniques on the optical and mechanical behavior of perovskites and the overall stability of IPSCs. Our findings demonstrate that the chemical treatment with fluorene-based conjugated polyelectrolyte (e.g., PFN-Br), in contrast to the physical UV-ozone method, induces distinct dendrite-like patterns at the buried interface. These changes profoundly impact the optical properties of the perovskite films, evidenced by red-shifted photoluminescence in these regions. Furthermore, the dendritic morphologies are shown to affect the mechanical properties of the as-crystallized perovskite films, such as a reduction in Young's modulus/hardness, which in turn modulate the device performance. The photovoltaic data indicate that these dendrite-like patterns are beneficial for the initial efficiencies but compromise the long-term stability of the derived IPSCs. This study provides valuable insights into buried-interface engineering strategies for achieving efficient and stable IPSCs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Future Photovoltaic Research Center, Global Institute of Future Technology, Shanghai Jiao Tong University, Shanghai 200240, China

Department of Chemical Engineering and Biotechnology and Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom

National Synchrotron Radiation Research Center (NSRRC), Hsinchu 300092, Taiwan

Advanced Technology Institute, Department of Electrical and Electronic Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom

BYD Auto Industry Co., Ltd., Shenzhen 518118, China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

School of Environmental Science and Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, China

Shanghai Non-Carbon Energy Conversion and Utilization Institute, Shanghai 200240, China

State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China

Funding

Startup Fund for Young Faculty at SJTU (SFYFat SJTU)

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