Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO26)
Publication date: 22nd April 2026
Hybrid Sn–Pb perovskite solar cells are promising candidates for tandem photovoltaic applications; however, their performance is frequently limited by severe photovoltage loss and insufficient operational stability, which mainly originate from interfacial recombination and poorly controlled crystallization processes. In this talk, I will present our systematic strategies to regulate interfacial recombination, crystallization dynamics, and carrier-selective contact properties through targeted interface engineering, growth modulation, and hole-transport-layer-free design. Specifically, dedoping PEDOT:PSS effectively reduces interfacial energy mismatch and suppresses non-radiative recombination, enabling more efficient hole extraction and a marked enhancement in open-circuit voltage.[1] Further modification using cPTANMe as a tailored hole transport layer improves interfacial energetics and charge selectivity, thereby minimizing recombination losses at the perovskite/HTL interface.[2] In parallel, a fullerene derivative is introduced as an additive to modulate crystallization behavior, refine film morphology, and stabilize the perovskite lattice, which mitigates interfacial degradation and enhances device durability. Beyond conventional HTL-based architectures, I will also discuss our recent progress in HTL-free hybrid Sn–Pb perovskite solar cells, where careful control of buried-interface quality, crystallization pathways, and interfacial energetics enables efficient charge extraction even in the absence of a dedicated hole transport layer. These HTL-free devices provide a simplified platform to uncover the intrinsic interplay between ionic distribution, interfacial defects, and non-radiative recombination, while also offering a practical route toward reducing parasitic losses and fabrication complexity.
C.-T. L. acknowledges the support from the National Science and Technology Council (114-2628-E-005 -001 -), and the Innovation and Development Centre of Sustainable Agriculture from The Featured Areas Research Centre Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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