Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation
Abstract
Much is known about the rate of photoexcited charge generation in at organic donor/acceptor (D/A) heterojunctions overaged over all relative arrangements. However, there has been very little experimental work investigating how the photoexcited electron transfer (ET) rate depends on the precise relative molecular orientation between D and A in thin solid films. This is the question that we address in this work. We find that the ET rate depends strongly on the relative molecular arrangement: The interface where the model donor compound copper phthalocyanine is oriented face-on with respect to the fullerene C60 acceptor yields a rate that is approximately 4 times faster than that of the edge-on oriented interface. Our results suggest that the D/A electronic coupling is significantly enhanced in the face-on case, which agrees well with theoretical predictions, underscoring the importance of controlling the relative interfacial molecular orientation.
- Authors:
-
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
- SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
- Soongsil Univ., Seoul (Korea)
- Stanford Univ., Stanford, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1215420
- Grant/Contract Number:
- 2011-0031628; KUS-C1-015-21
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry Letters
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 1948-7185
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; organic photovoltaic; core-hole clock; resonant photoemission; charge-transfer state; electron dynamics; resonant Auger
Citation Formats
Ayzner, Alexander L., Nordlund, Dennis, Kim, Do -Hwan, Bao, Zhenan, and Toney, Michael F. Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation. United States: N. p., 2014.
Web. doi:10.1021/jz502253r.
Ayzner, Alexander L., Nordlund, Dennis, Kim, Do -Hwan, Bao, Zhenan, & Toney, Michael F. Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation. United States. https://doi.org/10.1021/jz502253r
Ayzner, Alexander L., Nordlund, Dennis, Kim, Do -Hwan, Bao, Zhenan, and Toney, Michael F. Thu .
"Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation". United States. https://doi.org/10.1021/jz502253r. https://www.osti.gov/servlets/purl/1215420.
@article{osti_1215420,
title = {Ultrafast electron transfer at organic semiconductor interfaces: Importance of molecular orientation},
author = {Ayzner, Alexander L. and Nordlund, Dennis and Kim, Do -Hwan and Bao, Zhenan and Toney, Michael F.},
abstractNote = {Much is known about the rate of photoexcited charge generation in at organic donor/acceptor (D/A) heterojunctions overaged over all relative arrangements. However, there has been very little experimental work investigating how the photoexcited electron transfer (ET) rate depends on the precise relative molecular orientation between D and A in thin solid films. This is the question that we address in this work. We find that the ET rate depends strongly on the relative molecular arrangement: The interface where the model donor compound copper phthalocyanine is oriented face-on with respect to the fullerene C60 acceptor yields a rate that is approximately 4 times faster than that of the edge-on oriented interface. Our results suggest that the D/A electronic coupling is significantly enhanced in the face-on case, which agrees well with theoretical predictions, underscoring the importance of controlling the relative interfacial molecular orientation.},
doi = {10.1021/jz502253r},
journal = {Journal of Physical Chemistry Letters},
number = 1,
volume = 6,
place = {United States},
year = {Thu Dec 04 00:00:00 EST 2014},
month = {Thu Dec 04 00:00:00 EST 2014}
}
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