Organic indoor light harvesters achieving recorded output power over 500%enhancement under thermal radiated illuminances

热辐射光源下室内有机光伏电池实现输出功率密度500%的提升

Organic photovoltaic(OPV)cells have found their potential applications in the harvest of indoor light photons.However,the output power of such indoor devices is usually far from the demand of the internet of things.Therefore,it is essential to boost the output power of indoor organic photovoltaics to a much higher level.As wildly deployed among industrial and civil luminous environments,thermal radiation-based indoor light sources are alternative candidates to supply the essential power of the off-grid electronics with a broad consecutive emission spectrum.In this work,we evaluated the photovoltaic performance of organic solar cells under indoor incandescent and halogen illuminations.Impressively,under such thermal radiations,an improvement over 500%of the output power density can be achieved in comparison with that under light-emitting diodes and fluorescent lamps,reaching a record high value of 279.1 lWcm^(-2) by the PM6:Y6-based device.The remarkable power output is originated from the extra near-infrared spectrum of indoor thermal lights,which restricts the effective area under 10 cm^(2) in achieving 1 mW output power.This work clarifies the feasibility of collecting photons radiated from indoor thermal light sources through OPV cells,and enlightens the further applications of indoor OPV cells under multiple illumination environments.

有机光伏电池在室内光环境光电转换以及为物联网器件离网供能领域有着极佳的应用前景.但是,目前室内有机光伏的输出功率密度通常远低于物联网器件的实际需求.因此,必须将其输出功率密度提高到更高的水平.在工业和民用环境中广泛使用的热辐射光源有着连续的宽发射光谱,其更高的入射功率密度为器件的输出功率密度的提升提供了可能.本文研究了有机光伏电池在热辐射白炽灯和卤素灯光源下的光伏特性,结果表明与发光二极管和荧光光源相比,热辐射光源下器件的输出功率密度可提升超过500%,其中基于PM6:Y6活性层的器件实现了创纪录的279.1μW cm^(-2).高输出功率密度可将1 m W输出功率所需的器件面积降低至10 cm^(2)以下.这项工作阐明了室内有机光伏在热辐射光源下的工作机制,并验证了其在多种照明环境下的泛用性,促进了其进一步的应用研究与发展.