Selection strategy of porphyrins for achieving thermally stable polymer solar cells

Heating is a knotty factor contributing to device degradation of flexible organic solar cells (FOSCs), and thermal regulation plays a crucial role in the realization of long operational lifetime. Herein, a passive cooling strategy for stable FOSCs is proposed by boosting the optical-thermal radiative transfer to reduce the insufficient thermal dissipation and the elevated temperature caused by irradiation-induced heating, while retaining their flexibility and portability. A spectrally selective coupling structure consisting of subwavelength hemisphere pattern and distributed Bragg reflector is integrated into FOSCs to collectively enhance out-coupling of infrared radiation and limit near-infrared absorption-induced heat generation, leading to a reduced heat power intensity of 292.5 W cm −2 and the decreased working temperature by 9.6 °C under outdoor sunlight irradiation. The D18:Y6:PC 71 BM-based FOSCs achieve a power conversion efficiency of over 17% with a prolonged T 80 lifetime as long as one year under real outdoor working conditions. These results represent a new opportunity for enhancing the operational stability of FOSCs.

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Efficient and Stable Flexible Organic Solar Cells via the Enhanced Optical‐Thermal Radiative Transfer

Zhang

Ren

Chen

et al. 2023

Adv Funct Materials

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Transport and photophysical studies on porphyrin-containing sulfonated poly(etheretherketone) composite membranes

Sousa

Pina

Gomes

et al. 2021

Materials Today Communications

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Improved efficiency of polymer-fullerene bulk heterojunction solar cells by the addition of Cu(II)-porphyrin-oligothiophene conjugates

et al. 2016

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Ternary organic photovoltaic devices were prepared through the addition of small amounts of metalloporphyin-terthiophenes to two established low bandgap polymer:fullerene blends. The methodology afforded a PCDTBT:PC 71 BM-based device that displayed an initial power conversion efficiency of 5.1%, an increase of 16% when compared to the binary blend. Among the range of metalloporphyrins considered in this study, the Cu(II)-porphyrin derivatives were found to result in the most significant efficiency improvements.

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Selection strategy of porphyrins for achieving thermally stable polymer solar cells

Abstract: Excellent thermal stability combined with a comparable PCE was achieved for a P3HT:PCBM device in the presence of –NO2-substituted and Cu-metallized porphyrins.

Cited by 6 publications

References 49 publications

Efficient and Stable Flexible Organic Solar Cells via the Enhanced Optical‐Thermal Radiative Transfer

Efficient and Stable Flexible Organic Solar Cells via the Enhanced Optical‐Thermal Radiative Transfer

Transport and photophysical studies on porphyrin-containing sulfonated poly(etheretherketone) composite membranes

Improved efficiency of polymer-fullerene bulk heterojunction solar cells by the addition of Cu(II)-porphyrin-oligothiophene conjugates

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