首次！我国太阳能电池领域 取得突破性进展

Core Viewpoint - The development of all-perovskite tandem solar cells, which combine wide and narrow bandgap perovskite sub-cells, represents a significant advancement in next-generation photovoltaic technology, offering high efficiency and low cost [1]. Group 1: Nanjing University Research - A team from Nanjing University has developed an all-perovskite tandem solar cell with a power conversion efficiency of 30.1%, marking the first time that the efficiency of polycrystalline thin-film solar cells has exceeded 30% [3]. - The research utilized a dipole passivation strategy to enhance charge transport and reduce losses at the interface between the perovskite light-absorbing layer and the hole transport layer [3]. - Experimental data showed that the mobility of total carriers increased by over 68%, and the carrier diffusion length extended by nearly 30% after passivation treatment [3]. Group 2: Shanghai Jiao Tong University Research - A research team from Shanghai Jiao Tong University introduced a novel "matrix-confined molecular layer" for the hole transport layer, overcoming intrinsic limitations of traditional self-assembled monolayer systems [4]. - This new technology path addresses issues of film uniformity and interface stability in the preparation of perovskite photovoltaic modules [4]. - The collaboration with CATL's 21C Innovation Laboratory resulted in a large-size perovskite photovoltaic module (1m×2m) achieving a power conversion efficiency exceeding 20%, setting a world record in the field [4].