期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 31, 页码 15687-15694出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta06017h
关键词
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资金
- European Commission (European Research Council) [321305]
- Marie Sklodowska-Curie Individual Fellowship [745776]
- EPSRC [EP/L017008/1, EP/L012294/1]
- EPSRC [EP/L012294/1, EP/L017008/1] Funding Source: UKRI
- Marie Curie Actions (MSCA) [745776] Funding Source: Marie Curie Actions (MSCA)
We investigated singlet exciton diffusion in threeITICderivatives used as electron acceptors in organic photovoltaics (OPVs) by time-resolved photoluminescence volume quenching and exciton-exciton annihilation. The exciton diffusion coefficient was found to be in the range of 0.003-0.007 cm(2)s(-1)which leads to a three-dimensional exciton diffusion length of up to 31 nm. We fabricated solar cells using bulk heterojunctions of these acceptors with the electron donorPTB7-Thwhich showed similar to 7% efficiency and large scale phase separation. Our results show that long range exciton diffusion and large domains offer significant advantages for OPVs.
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