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

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

Journal Article · Tue Jan 16 23:00:00 EST 2018 · Advanced Energy Materials

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

^[1]; Fusella, Michael A. ^[2]; ^[2]

Princeton Univ., NJ (United States); Princeton University
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.

View Accepted Manuscript (DOE)

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

OSTI ID:: 1595409

Alternate ID(s):: OSTI ID: 1417213

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

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Charge-transfer electronic states in organic solar cells Coropceanu, Veaceslav; Chen, Xian-Kai; Wang, Tonghui Nature Reviews Materials, Vol. 4, Issue 11 https://doi.org/10.1038/s41578-019-0137-9	journal	September 2019
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
Cyanine platelet single crystals: growth, crystal structure and optical spectra Leclaire, Nicolas A.; Li, Musen; Véron, Anna C. Physical Chemistry Chemical Physics, Vol. 20, Issue 46 https://doi.org/10.1039/c8cp06034g	journal	January 2018
A universal layer-by-layer solution-processing approach for efficient non-fullerene organic solar cells Sun, Rui; Guo, Jing; Sun, Chenkai Energy & Environmental Science, Vol. 12, Issue 1 https://doi.org/10.1039/c8ee02560f	journal	January 2019
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
Spontaneous open-circuit voltage gain of fully fabricated organic solar cells caused by elimination of interfacial energy disorder Sun, Rui; Deng, Dan; Guo, Jing Energy & Environmental Science, Vol. 12, Issue 8 https://doi.org/10.1039/c9ee00825j	journal	January 2019
Inorganic perovskite solar cells: an emerging member of the photovoltaic community Duan, Jialong; Xu, Hongzhe; Sha, W. E. I. Journal of Materials Chemistry A, Vol. 7, Issue 37 https://doi.org/10.1039/c9ta06674h	journal	January 2019
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
Variable charge transfer state energies at nanostructured pentacene/C ₆₀ interfaces Lin, YunHui L.; Zhang, Fengyu; Kerner, Ross A. Applied Physics Letters, Vol. 112, Issue 21 https://doi.org/10.1063/1.5030885	journal	May 2018
Geminate recombination in organic photovoltaic blend PCDTBT/PC ₇₁ BM studied by out-of-phase electron spin echo spectroscopy Beletskaya, E. A.; Lukina, E. A.; Uvarov, M. N. The Journal of Chemical Physics, Vol. 152, Issue 4 https://doi.org/10.1063/1.5131855	journal	January 2020

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