An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency

Literature Information

Publication Date 2022-10-26
DOI 10.1039/D2EE03134E
Impact Factor 38.532
Authors

Ji Wan, Yao Wu, Rui Sun, Jiawei Qiao, Xiaotao Hao, Jie Min


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Abstract

How to design organic solar cell (OSC) systems with high device efficiency and excellent processing performance is still one of the urgent issues to be solved. Herein, we designed an asymmetric acceptor BTP-F3Cl and incorporated it into the PM1:L8-BO blend. Compared with the L8-BO neat acceptor, the L8-BO:BTP-F3Cl alloy acceptor shows larger exciton diffusion length, higher photoluminescence quantum yield and superior electron mobility. With the introduction of BTP-F3Cl, the red-shifted absorption spectra, the prolonged exciton lifetime, the enhanced charge transport property, and the depressed non-radiative recombination promote the ternary system to obtain improved short-circuit current density and fill factor. Consequently, the ternary device delivers an efficiency of 19.1% (certified as 18.7%), representing one of the highest values reported so far. Moreover, this system can achieve a promising efficiency of approximately 19% in tetrahydrofuran-processed OPV devices fabricated by a blade-coating technology. Importantly, the BTP-F3Cl-introduced ternary system can overcome the scaling lag of device efficiency more effectively than the host system. Overall, this work can effectively guide the lab-to-manufacturing translation of green printing OSCs.

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Front cover

Cover

DOI: 10.1039/C6PY90007K

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Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
Self-citation Rate: 3.4%
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Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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