Solar energy paper index
High-performance multijunction perovskite LEDs with reduced interconnection loss
One-line summary
A solar energy research paper on High-performance multijunction perovskite LEDs with reduced interconnection loss.
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
Abstract Tandem light-emitting diodes (LEDs) offer advantages in efficiency, brightness and lower the current density for a target brightness, but their implementation in solution-processed perovskite LEDs is limited by interconnection strategies that introduce high voltage penalties and poor robustness. Here we demonstrate a hierarchically structured interconnection layer (ICL) integrating a near-degenerate charge-generation junction with a crystalline-amorphous oxide composite, enabling low-barrier transport and solvent-tolerant stacking with reduced loss. Using this ICL, we realize double-junction perovskite LEDs in which two subunits operate efficiently in series, achieving a peak external quantum efficiency (EQE) of 42.6%, a maximum radiance of 690 W sr −1 m −2 , and low driving voltage. The ICL is compatible with multiple perovskite emitters and supports scalable multijunction integration, yielding multijunction devices with sub-bandgap turn-on voltages and high EQEs exceeding 60%. Our results establish a low-loss interconnection strategy for series-stacked perovskite emitters, providing a practical route toward high-brightness and multi-wavelength perovskite light sources.
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