Issue 9, 2019

Design of organic small molecules for photovoltaic application with high open-circuit voltage (Voc)

Abstract

Open-circuit voltage (Voc), as a key parameter, plays an important role in determining power conversion efficiency (PCE) of organic solar cells (OSCs). With the rapid development in OSCs based on small molecules, more and more attention has been paid to fabricate photovoltaic devices with high Voc values by designing novel small molecule materials, which has pushed the highest Voc values for single-junction OSCs based on small molecules as donors or acceptors to be 1.12 V and 1.36 V, respectively. In this review, recent advances with respect to photovoltaic materials applied in OSCs featuring high Voc values will be summarized from two aspects: small molecule donors and small molecule acceptors. Moreover, we will systematically discuss the relationship between molecular structures of small molecule materials and Voc values for OSCs, which will provide a guideline on the design of organic small molecule materials for obtaining photovoltaic devices with high Voc values.

Graphical abstract: Design of organic small molecules for photovoltaic application with high open-circuit voltage (Voc)

Article information

Article type
Review Article
Submitted
28 ១២ 2018
Accepted
30 ១ 2019
First published
30 ១ 2019

J. Mater. Chem. C, 2019,7, 2487-2521

Design of organic small molecules for photovoltaic application with high open-circuit voltage (Voc)

X. He, L. Yin and Y. Li, J. Mater. Chem. C, 2019, 7, 2487 DOI: 10.1039/C8TC06589F

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