Tuning the Crystallinity and Phase Separation by Two‐Step Annealing Enables Block Copolymer‐Based Organic Solar Cells with 15% Efficiency
Source abstract
Abstract
Block copolymer‐based organic solar cells (OSCs) possess better stability than their binary all‐polymer counterparts; thus, promoting the power conversion efficiency (PCE) of them to a higher level would be meaningful to achieving a higher level of efficiency–stability balance. Herein, two‐step annealing combining solvent vapor and thermal annealing (TA) upon cast films is deployed and 15% efficiency for block copolymer PM6‐b‐PY‐IT‐based OSCs is realized, which appeals to the level of traditional binary all‐polymer solar cells. The morphology optimization of the properly enhanced crystallite size, global crystallinity, and reduced pure phase length scale and maintained phase purity are supposed to be the driving force of increase device performance. This work offers a high PCE for the typical type of solar cell, brightening the prospect of realizing OSCs’ application.
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Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Julong College Shenzhen Technology University Shenzhen 518118 China
Guangxi Key Lab of Processing for Nonferrous Metals and Featured Materials and Key lab of new Processing Technology for Nonferrous Metals and Materials Ministry of Education School of Resources, Environments and Materials, Guangxi University Nanning 530004 China
College of New Materials and New Energies Shenzhen Technology University Shenzhen China
Centre for Mechanical Technology and Automation Department of Mechanical Engineering University of Aveiro 3810-193 Aveiro Portugal
School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 P. R. China
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