Employing inorganic/organic hybrid interface layer to improve electron transfer for inverted polymer solar cells

Li, Zhiqi; Zhang, Mengjie; Li, Shujun; Liu, Chunyu; Zhang, Zhihui; Li, Jinfeng; Shen, Liang; Guo, Wenbin; Ruan, Shengping

doi:10.1016/j.electacta.2016.06.022

Cited by 4 publications

(2 citation statements)

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“…Meanwhile, the rough layer increases the interface defects, which could also cause charge carrier recombination of the interface of the C 60 ; hence, a bad performance of the device is obtained. 41 Interestingly, it was found that the spreading property of the PC 71 BM chlorobenzene solutions on the C 60 surface was better than bare TiO 2 and UV treated TiO 2 films, which reflects different wetting or coating character for the active layers (blend of PTB7:PC 71 BM) on the C 60 -coating TiO 2 layers. To prove this conjecture, the contact angles of the nanofilms with deionized water (Figure 3) were measured.…”

Section: Resultsmentioning

confidence: 98%

“…The exaggerated surface roughness of C 60 gave a cross-linking of polymerization, which caused a bad interfacial contact with the active layer, leading to an increased interfacial charge recombination probability. Meanwhile, the rough layer increases the interface defects, which could also cause charge carrier recombination of the interface of the C 60 ; hence, a bad performance of the device is obtained …”

Section: Resultsmentioning

confidence: 99%

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Dual Roles of the Fullerene Interlayer on Light Harvesting and Electron Transfer for Highly Efficient Polymer Solar Cells

Liu

Zhang

et al. 2017

J. Phys. Chem. C

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There are two critical strategies to achieve the high photoelectric conversion efficiency of polymer photovoltaic cells: broadening the light absorption spectra of the active layer and efficiently splitting photogenerated excitons with a low probability of recombination. Herein, we demonstrate the improved light trapping and reduced photogenerated exciton recombination probability of the inverted heterojunction solar cells by incorporating C60 fullerene modification. This approach ameliorates traditional multiblend/layer systems, and allows multiple acceptor materials to synergistically work. After the fullerene modification layer was incorporated, the optimal device presents a 25.5% improvement of power conversion efficiency (PCE) up to 9.458% with an open circuit voltage (V oc) of 0.8 V, a short-circuit current (J sc) of 18.575 mA/cm2, and a fill factor (FF) of 63.4%. This study provides a novel inspiration for the structure development of high-efficiency photovoltaic devices.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%