journal article·2025-07

Carrier Dynamics of Facet‐Dependent Heterogeneous Interfaces in High‐Performance Perovskite Solar Cells

Pengxiang Zhang, Cheng Zhu, Wenli Su, Shihao Wang, Zipeng Xu, Shanshan Wang, Mingxuan Qi, Xiaotian Bao, Fenglong Kang, Tongtong Hao, Qi Chen, Yang Bai, Xinfeng Liu, Gang Tang, Wenkai Zhang

Advanced Functional Materials· Volume 35· Issue 27
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Abstract

Abstract Understanding carrier dynamics at interfaces and the interplay of surface structures is critical for improving perovskite solar cells. However, the competitive impact of facet‐dependent terminations and defects on carrier behavior remains unclear. Herein, carrier dynamics at all interfaces of quasi‐single‐crystal films with (001) and (111) preferred orientation are investigated. The carrier extraction time of the (001) top interface is the shortest (0.57 ns), followed by that of the (111) top interface (1.32 ns), while the (001)/(111) buried interfaces take longer times (3.61 and 5.87 ns), respectively. Carrier extraction at the top interface is observed to be markedly more efficient than that at the buried interface, attributed to the strong interfacial dipole and favorable band alignment induced by heterostructures involving phosphate group interactions. Moreover, the carrier extraction at the top interface of the (111) film is much lower than that of the (001) film due to severe defect‐assisted nonradiative recombination. It reveals that exposed surface terminations can influence the formation energy of interfacial defects, leading to the deep‐level defects. Ultimately, the (001)‐oriented device with excellent carrier extraction obtains a champion power conversion efficiency of 25.26% and a T90 lifetime of 400 h during maximum power point tracking.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films · Conducting polymers and applications

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

Affiliations

School of Physics and Astronomy Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies Beijing Normal University Beijing 100875 China

Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing 100081 China

State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low‐dimensional Quantum Structure and Devices Experimental Center of Advanced Materials School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

Analysis and Testing Center Beijing Institute of Technology Beijing 100081 China

CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 China

School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China

Key Laboratory of Multiscale Spin Physics Ministry of Education Beijing Normal University Beijing 100875 China

Funding

Beijing Institute of Technology Research Fund Program for Young Scholars · National Natural Science Foundation of China

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