Publication date: 11th March 2026
Perovskite solar cells (PSCs) have emerged as a leading candidate for next-generation photovoltaics, primarily due to their potential for fabrication via solution-based coating processes. Over the past decade, significant improvements in power conversion efficiency (PCE) have been driven by fundamental advances in materials chemistry. Key breakthroughs include refined film formation methods for metal halide perovskite semiconductors, the development of sophisticated surface passivation techniques, and the engineering of novel materials for efficient charge extraction from the perovskite layer.
Our research group has been engaged in the development of PSCs since the field’s early stages, focusing on these material chemistry perspectives to enhance device performance. In 2018, leveraging our accumulated expertise, we co-founded EneCoat Technologies Co., Ltd.—a Kyoto University-spinoff startup—to accelerate the practical application and commercialization of this technology.1,2
In this presentation, I will outline our strategic research approach and highlight representative achievements to date, including:
- High-purity precursor materials: Development of proprietary precursors that enable the highly reproducible fabrication of high-quality perovskite thin films.3,4
- Photophysical mechanism clarification: Utilization of advanced spectroscopic techniques to elucidate the unique optical properties and charge-generation mechanisms inherent to metal halide perovskites.5,6
- Charge-collecting material engineering: Design of multipodal pi-conjugated molecules (e.g., PATAT) to precisely control energy levels and molecular orientation on transparent electrodes (ITO).7-9
- Interface and process optimization: Development of surface-modified materials with dipole moments and a unique passivation method for both the top and bottom interfaces of the perovskite layer, leading to significantly higher open-circuit voltages.10-17
This work was partially supported by JST–Mirai (JPMJMI22E2), NEDO (JPNP20015), NEDO-GI (JPNP21016) programs, International Collaborative Research Program of ICR, Kyoto University, Grant-in-Aid for Scientific Research (A) (JP24H00481), Grant-in-Aid for Scientific Research (B) (JP24K01571, JP24K01607), and Grant-in-Aid for Transformative Research Areas (A) (JP25H01262).
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