Impact of the Crystallite Orientation Distribution on Exciton Transport in Donor–Acceptor Conjugated Polymers
- Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., CA (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
Conjugated polymers are widely used materials in organic photovoltaic devices. Owing to their extended electronic wave functions, they often form semicrystalline thin films. In this work, we aim to understand whether distribution of crystallographic orientations affects exciton diffusion using a low-band-gap polymer backbone motif that is representative of the donor/acceptor copolymer class. Using the fact that the polymer side chain can tune the dominant crystallographic orientation in the thin film, we have measured the quenching of polymer photoluminescence, and thus the extent of exciton dissociation, as a function of crystal orientation with respect to a quenching substrate. We find that the crystallite orientation distribution has little effect on the average exciton diffusion length. Here, we suggest several possibilities for the lack of correlation between crystallographic texture and exciton transport in semicrystalline conjugated polymer films.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Molecularly Engineered Energy Materials (MEEM)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0001342; KUS-C1-015-21
- OSTI ID:
- 1370226
- Journal Information:
- ACS Applied Materials and Interfaces, Vol. 7, Issue 51; Related Information: MEEM partners with University of California, Los Angeles (lead); University of California, Berkeley; Eastern Washington University; University of Kansas; National Renewable Energy Laboratory; ISSN 1944-8244
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Efficient Quaternary Organic Solar Cells with Parallel-Alloy Morphology
|
journal | January 2019 |
Synthesis of novel conjugated polymers based on benzo[1,2- d :4,5- d ′]-bis([1,2,3]triazole) for applications in organic field-effect transistors
|
journal | January 2019 |
Morphology Characterization of Bulk Heterojunction Solar Cells
|
journal | February 2018 |
Similar Records
Effect of Broken Conjugation on the Excited State: Ether Linkage in the Cyano-Substituted Poly(p-phenylene vinylene) Conjugated Polymer Poly(2,5,2',5'-tetrahexyloxy-8, 7'-dicyano-di-p-phenylene vinylene)
Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation