Solar energy paper index
Low‐Temperature Melting–Crystallization Transition in Perovskites With Self‐Trapped Excitons for Photovoltaic Downconversion
One-line summary
A solar energy research paper on Low‐Temperature Melting–Crystallization Transition in Perovskites With Self‐Trapped Excitons for Photovoltaic Downconversion.
Engineering notes
Engineering notes will be added by the Power for Solar editorial team.
Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
Self-trapped exciton (STE) emitters demonstrate exceptional luminescent downconversion (LDC) performance, achieving near-unity photoluminescence quantum yields (PLQY) and broadband emission that overcomes Stokes shift limitations in conventional fluorophores. While these properties originate from precisely engineered Jahn-Teller distorted centers through optimized ligand fields and quantum confinement, practical challenges in stability and solution processability have hindered photovoltaic integration. In this work, we develop tin-halide perovskite exhibiting unique low-temperature (125°C) reversible melting-crystallization transitions for solution processability, as well as highly efficient (>90% PLQY) broadband LDC through zero-dimensional STE emission. When integrated as the LDC layer, this reversible melting-crystallization STE emitter enhances the external quantum efficiency of silicon solar cells in the short-wavelength region, leading to an absolute improvement in power conversion efficiency of over 0.75%. Our findings establish a new paradigm for low-temperature melt-processed perovskite integration in silicon photovoltaics, offering both economic viability and scalability for performance enhancement beyond current technological limits.
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