The Impact of Local Morphology on Organic Donor/Acceptor Charge Transfer States

Lin, YunHui L.; Fusella, Michael A.; Rand, Barry P.

doi:10.1002/aenm.201702816

Title: The Impact of Local Morphology on Organic Donor/Acceptor Charge Transfer States

Journal Article · Wed Jan 17 00:00:00 EST 2018 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201702816· OSTI ID:1595409

^[1]; Fusella, Michael A. ^[1];

^[1]

Princeton Univ., NJ (United States)

A major breakthrough in the field of organic photovoltaics (OPVs) was the development of the donor/acceptor heterojunction that aids in separating Coulombically bound excitons that are generated upon photoabsorption. Additionally, bound charge transfer (CT) states that result from the exchange of charge carriers across the donor/acceptor interface are believed to play an important role in charge generation. Though organic thin films are often disordered, enhancements to the local structural order at the donor/acceptor interface have recently been shown to greatly influence CT state energetics and the charge generation process. In this progress report, recent efforts to understand the role that donor/acceptor morphology plays in the behavior of CT states and the resulting implications on OPV function are presented. Furthermore, it is aimed to provide a survey of different experimental approaches and to present a balanced examination of current interpretations of key results, and to offer best practices for the fabrication and study of morphologically tunable donor/acceptor CT states.

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Research Organization:: Princeton Univ., NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0012458; CBET‐1604524

OSTI ID:: 1595409

Alternate ID(s):: OSTI ID: 1417213

Journal Information:: Advanced Energy Materials, Vol. 8, Issue 28; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 65 works

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Thousand-atom ab initio calculations of excited states at organic/organic interfaces: toward first-principles investigations of charge photogeneration Fujita, Takatoshi; Alam, Md. Khorshed; Hoshi, Takeo Physical Chemistry Chemical Physics, Vol. 20, Issue 41 https://doi.org/10.1039/c8cp05574b	journal	January 2018
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Effects of end-on oriented polymer chains at the donor/acceptor interface in organic solar cells Wang, Fanji; Nakano, Kyohei; Yoshida, Hiroyuki Journal of Materials Chemistry A, Vol. 6, Issue 45 https://doi.org/10.1039/c8ta09307e	journal	January 2018
Morphology of small molecular donor/polymer acceptor blends in organic solar cells: effect of the π–π stacking capability of the small molecular donors Zhang, Zijian; Ding, Zicheng; Miao, Junhui Journal of Materials Chemistry C, Vol. 7, Issue 34 https://doi.org/10.1039/c9tc03819a	journal	January 2019
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Effect of Charge-Transfer State Energy on Charge Generation Efficiency via Singlet Fission in Pentacene–Fullerene Solar Cells Willems, Robin E. M.; Meskers, Stefan C. J.; Wienk, Martijn M. The Journal of Physical Chemistry C, Vol. 123, Issue 16 https://doi.org/10.1021/acs.jpcc.9b00568	journal	April 2019

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