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thick active-layer Organic Solar Cells

Chinese Journal of Chemistry 2023年第24期41卷 3739-3750页

作者： Zesheng Liu Tengfei Li Yuze Lin Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190 China University of Chinese Academy of Sciences Beijing100049 China

Organic solar cells(OSCs)present a promising renewable energy technology due to their cost-effectiveness,adaptability,and lightweight *** advent of non-fullerene acceptors has further boosted their significance,allowing for power conversion efficiencies surpassing 19%even with an active layer thickness of about 100 ***,in order to achieve large scale production,it is necessary to fabricate OSCs with thicker active layers exceeding 300 nm that are compatible with large-area printing ***,OSCs with thick active layers have inferior performance compared to those with thin active *** expedite the transition of OSCs from laboratory to industrial high-throughput manufacturing,considerable efforts have been made to comprehend the performance limitations of thick active-layer OSCs,develop novel photoactive materials that are high-performance and tolerant towards the thickness of the active layer,and optimize the morphology of the photoactive layer and device *** review aims to provide a comprehensive summary of the mechanisms that lead to efficiency loss in thick active-layer OSCs,the representative works on molecular design,and the optimization strategies for high-performance thick active-layer OSCs,and the remaining challenges that must be addressed.

关键词： Organic solar cells Charge transport Charge extraction and recombination thick active layer Energy loss

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Over 1 μm thickness active layer Inverted Organic Photovoltaics

Over 1 μm Thickness Active Layer Inverted Organic Photovolt...

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中国化学会第29届学术年会

作者： Xiong Gong Xiaowen Hu Chao Yi Ming Wang Chih-Hao Hsu Shengjian Liu Kai Zhang Chengmei Zhong Fei Huang Yong Cao State Key Laboratory of Luminescent Materials and Devices South China University of Technology College of Polymer Science and Polymer Engineering The University of Akron

Bulk heterojunction（BHJ） organic photovoltaics（OPV） are regarded as one of the most promising alternatives to inorganic-based solar cells. The efficiency exceeded 10% from single cells and 12% from tandem cells have been reported. However, commercial available OPV are not on the market mainly due to the difficulties in fabricating homogenous and pinhole-free thin BHJ active layer by large-scale high throughput roll-to-roll manufacturing processing. Here, we report high performance inverted OPV with over 1 μm thickness active layer. By using alcohol-soluble thermal cross-linkable conjugated polyfluorene as an electron extraction layer（EEL）, an efficiency of 8.62% is observedfrom the inverted OPV with BHJ film thickness of 280nm;an efficiency of 7.20% is observed from the inverted OPV with BHJ film thickness over 1 μm. Such high efficiency from such thick BHJ composite film is attributed to the high hole mobility of electron donor polymer characterized by the space-charge-limited-current method, and grazing-incidence small-angle and wide-angle x-ray scattering measurement. The high efficiency from theinverted OPV with such thick BHJ composite film certainly provides a solution to resolve the bottleneck problem for manufacturing OPV products by low-cost high throughput roll-to-roll processing.

关键词： Inverted Polymer Solar Cells thick active layer High Efficiency

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