报告题目：Photophysics of single-component and heterojunctions in organic photovoltaics

报  告 人：杨顸博 博士，帝国理工大学

研究方向：有机光伏材料

报告时间：2026年4月13日(星期一)下午15:00

报告地点：量子楼410报告厅

报告摘要：

The emergence of a third generation of electron-accepting organic semiconductors has led to a step-change in organic solar cell power conversion efficiencies, now exceeding 20 % in efficiency. A central factor behind this leap is their exceptionally high radiative efficiency, which reduces non-radiative voltage losses. To understand the excited-state processes in these new materials, I will be combining temperature-dependent spectroscopy with a Bayesian implementation of the Marcus-Levich-Jortner formalismto extract key factors such as transition energies, reorganisation energies, and vibrational couplings. We apply this approach to study different families and found that Y-series electron-acceptors hold exceptionally low high-frequency reorganisation energies with pronounced energetic broadening, consistent with exciton delocalisation driven by their rigid backbones and close intermolecular interactions.

Next, recognising the critical role of interfacial charge-transfer (CT) states in charge generation, we introduce a purpose-built electron donor-acceptor polymer that locks the relative geometry of the donor and acceptor units. This design enables a systematic study of CT character and reveals clear strategies for tuning CT energies and kinetics—insights that are essential for pushing organic photovoltaics efficiencies further.

报告人简介：

杨顸博，博士毕业于帝国理工学院，在Jenny Nelson和Jarvist Moore Frost 组研究有机光伏（OPV）材料基础研究，重点关注理论模拟与光谱表征。研究成果发表于 Nature Chemistry、Advanced Energy Materials 等期刊。现为斯旺西大学博士后研究员，获 EPSRC 资助。