A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions

Qian Zhang; Sidney R. Cohen; Irit Rosenhek-Goldian; Daniel Amgar; Omri Bar-Elli; Yael Tsarfati; Tatyana Bendikov; Linda J. W. Shimon; Yishay Feldman; Mark A. Iron; Haim Weissman; Igal Levine; Dan Oron; Boris Rybtchinski

doi:10.1021/acs.jpcc.9b04875

A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions

Qian Zhang, Sidney R. Cohen, Irit Rosenhek-Goldian, Daniel Amgar, Omri Bar-Elli, Yael Tsarfati, Tatyana Bendikov, Linda J. W. Shimon, Yishay Feldman, Mark A. Iron, Haim Weissman, Igal Levine, Dan Oron, Boris Rybtchinski^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Organic photovoltaics enable cost-efficient, tunable, and flexible platforms for solar energy conversion, yet their performance and stability are still far from optimal. Here, we present a study of photoinduced charge transfer processes between electron donor and acceptor organic nanocrystals as part of a pathfinding effort to develop robust and efficient organic nanocrystalline materials for photovoltaic applications. For this purpose, we utilized nanocrystals of perylenediimides as the electron acceptors and nanocrystalline copper phthalocyanine as the electron donor. Three different configurations of donor-acceptor heterojunctions were prepared. Charge transfer in the heterojunctions was studied with Kelvin probe force microscopy under laser or white light excitation. Moreover, detailed morphology characterizations and time-resolved photoluminescence measurements were conducted to understand the differences in the photovoltaic processes of these organic nanocrystals. Our work demonstrates that excitonic properties can be tuned by controlling the crystal and interface structures in the nanocrystalline heterojunctions, leading to a minimization of photovoltaic losses.

Original language	English
Pages (from-to)	25031-25041
Number of pages	11
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	41
Early online date	11 Sept 2019
DOIs	https://doi.org/10.1021/acs.jpcc.9b04875
Publication status	Published - 17 Oct 2019

Funding

This work was supported by grants from the Israel Science Foundation and Sustainability and Energy Research Initiative (SAERI). The EM studies were conducted at the Irving and Cherna Moskowitz Center for Nano and Bio-Nano Imaging (Weizmann Institute). We thank Dr. Miri Kazes for assisting with the absolute fluorescence quantum yield experiments. Q. Z. is supported by the Dean of Faculty Fellowship and the SAERI postdoctoral fellowship.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/acs.jpcc.9b04875

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Zhang, Q., Cohen, S. R., Rosenhek-Goldian, I., Amgar, D., Bar-Elli, O., Tsarfati, Y., Bendikov, T., Shimon, L. J. W., Feldman, Y., Iron, M. A., Weissman, H., Levine, I., Oron, D., & Rybtchinski, B. (2019). A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions. Journal of Physical Chemistry C, 123(41), 25031-25041. https://doi.org/10.1021/acs.jpcc.9b04875

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title = "A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions",

abstract = "Organic photovoltaics enable cost-efficient, tunable, and flexible platforms for solar energy conversion, yet their performance and stability are still far from optimal. Here, we present a study of photoinduced charge transfer processes between electron donor and acceptor organic nanocrystals as part of a pathfinding effort to develop robust and efficient organic nanocrystalline materials for photovoltaic applications. For this purpose, we utilized nanocrystals of perylenediimides as the electron acceptors and nanocrystalline copper phthalocyanine as the electron donor. Three different configurations of donor-acceptor heterojunctions were prepared. Charge transfer in the heterojunctions was studied with Kelvin probe force microscopy under laser or white light excitation. Moreover, detailed morphology characterizations and time-resolved photoluminescence measurements were conducted to understand the differences in the photovoltaic processes of these organic nanocrystals. Our work demonstrates that excitonic properties can be tuned by controlling the crystal and interface structures in the nanocrystalline heterojunctions, leading to a minimization of photovoltaic losses.",

author = "Qian Zhang and Cohen, {Sidney R.} and Irit Rosenhek-Goldian and Daniel Amgar and Omri Bar-Elli and Yael Tsarfati and Tatyana Bendikov and Shimon, {Linda J. W.} and Yishay Feldman and Iron, {Mark A.} and Haim Weissman and Igal Levine and Dan Oron and Boris Rybtchinski",

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Zhang, Q, Cohen, SR , Rosenhek-Goldian, I , Amgar, D, Bar-Elli, O, Tsarfati, Y, Bendikov, T , Shimon, LJW , Feldman, Y , Iron, MA , Weissman, H, Levine, I, Oron, D & Rybtchinski, B 2019, 'A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions', Journal of Physical Chemistry C, vol. 123, no. 41, pp. 25031-25041. https://doi.org/10.1021/acs.jpcc.9b04875

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T1 - A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions

AU - Zhang, Qian

AU - Cohen, Sidney R.

AU - Rosenhek-Goldian, Irit

AU - Amgar, Daniel

AU - Bar-Elli, Omri

AU - Tsarfati, Yael

AU - Bendikov, Tatyana

AU - Shimon, Linda J. W.

AU - Feldman, Yishay

AU - Iron, Mark A.

AU - Weissman, Haim

AU - Levine, Igal

AU - Oron, Dan

AU - Rybtchinski, Boris

PY - 2019/10/17

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N2 - Organic photovoltaics enable cost-efficient, tunable, and flexible platforms for solar energy conversion, yet their performance and stability are still far from optimal. Here, we present a study of photoinduced charge transfer processes between electron donor and acceptor organic nanocrystals as part of a pathfinding effort to develop robust and efficient organic nanocrystalline materials for photovoltaic applications. For this purpose, we utilized nanocrystals of perylenediimides as the electron acceptors and nanocrystalline copper phthalocyanine as the electron donor. Three different configurations of donor-acceptor heterojunctions were prepared. Charge transfer in the heterojunctions was studied with Kelvin probe force microscopy under laser or white light excitation. Moreover, detailed morphology characterizations and time-resolved photoluminescence measurements were conducted to understand the differences in the photovoltaic processes of these organic nanocrystals. Our work demonstrates that excitonic properties can be tuned by controlling the crystal and interface structures in the nanocrystalline heterojunctions, leading to a minimization of photovoltaic losses.

AB - Organic photovoltaics enable cost-efficient, tunable, and flexible platforms for solar energy conversion, yet their performance and stability are still far from optimal. Here, we present a study of photoinduced charge transfer processes between electron donor and acceptor organic nanocrystals as part of a pathfinding effort to develop robust and efficient organic nanocrystalline materials for photovoltaic applications. For this purpose, we utilized nanocrystals of perylenediimides as the electron acceptors and nanocrystalline copper phthalocyanine as the electron donor. Three different configurations of donor-acceptor heterojunctions were prepared. Charge transfer in the heterojunctions was studied with Kelvin probe force microscopy under laser or white light excitation. Moreover, detailed morphology characterizations and time-resolved photoluminescence measurements were conducted to understand the differences in the photovoltaic processes of these organic nanocrystals. Our work demonstrates that excitonic properties can be tuned by controlling the crystal and interface structures in the nanocrystalline heterojunctions, leading to a minimization of photovoltaic losses.

U2 - 10.1021/acs.jpcc.9b04875

DO - 10.1021/acs.jpcc.9b04875

M3 - Article

SN - 1932-7447

VL - 123

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 41

ER -

A Nanoscopic View of Photoinduced Charge Transfer in Organic Nanocrystalline Heterojunctions

Abstract

Funding

All Science Journal Classification (ASJC) codes

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