Abstract
A series of polycyclic aromatic hydrocarbons (PAHs) with extended π-conjugated cores (from naphthalene, anthracene, pyrene, to perylene) are incorporated into nonfullerene acceptors for the first time. Four different fused-ring electron acceptors (FREAs), i.e., DTN-IC-2Ph, DTA-IC-3Ph, DTP-IC-4Ph, and DTPy-IC-5Ph, are prepared via simple and facile synthetic procedures, yielding a remarkable platform to study the structure–property relationship for nonfullerene solar cells. With the PAH core being extended systematically, the gradually redshifted absorption with enhanced molar extinction coefficient (ε) is realized, the energy level of the highest occupied molecular orbital is up-shifted, and the electron mobility is greatly enhanced. Meanwhile, the solubility decreases and the molecular packing becomes strengthened. As a result, with an optimized combination of these characteristics, DTP-IC-4Ph attains good solubility, high molar extinction coefficient, complementary absorption, suitable morphology, well-matched energy levels, as well as efficient charge dissociation and transport in blend film. Consequently, the DTP-IC-4Ph-based solar cells with a donor polymer, poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))] (PBDB-T) exhibit a promising power conversion efficiency of 10.37% without any additives, which is close to the best performance achieved in additive-free nonfullerene solar cells (NFSCs). The results demonstrate that the PAH building blocks have great potential for the construction of novel FREAs for efficient additive-free NFSCs.
| Original language | English |
|---|---|
| Article number | 1803976 |
| Journal | Advanced Energy Materials |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
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Keywords
- additive-free
- low-cost
- nonfullerene organic solar cells
- polycyclic aromatic hydrocarbon
- structure–property relationship
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
Cite this
Facile Synthesis of Polycyclic Aromatic Hydrocarbon (PAH)–Based Acceptors with Fine-Tuned Optoelectronic Properties : Toward Efficient Additive-Free Nonfullerene Organic Solar Cells. / Wang, Yang; Liu, Bin; Koh, Chang Woo; Zhou, Xin; Sun, Huiliang; Yu, Jianwei; Yang, Kun; Wang, Hang; Liao, Qiaogan; Woo, Han Young; Guo, Xugang.
In: Advanced Energy Materials, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Facile Synthesis of Polycyclic Aromatic Hydrocarbon (PAH)–Based Acceptors with Fine-Tuned Optoelectronic Properties
T2 - Toward Efficient Additive-Free Nonfullerene Organic Solar Cells
AU - Wang, Yang
AU - Liu, Bin
AU - Koh, Chang Woo
AU - Zhou, Xin
AU - Sun, Huiliang
AU - Yu, Jianwei
AU - Yang, Kun
AU - Wang, Hang
AU - Liao, Qiaogan
AU - Woo, Han Young
AU - Guo, Xugang
PY - 2019/1/1
Y1 - 2019/1/1
N2 - A series of polycyclic aromatic hydrocarbons (PAHs) with extended π-conjugated cores (from naphthalene, anthracene, pyrene, to perylene) are incorporated into nonfullerene acceptors for the first time. Four different fused-ring electron acceptors (FREAs), i.e., DTN-IC-2Ph, DTA-IC-3Ph, DTP-IC-4Ph, and DTPy-IC-5Ph, are prepared via simple and facile synthetic procedures, yielding a remarkable platform to study the structure–property relationship for nonfullerene solar cells. With the PAH core being extended systematically, the gradually redshifted absorption with enhanced molar extinction coefficient (ε) is realized, the energy level of the highest occupied molecular orbital is up-shifted, and the electron mobility is greatly enhanced. Meanwhile, the solubility decreases and the molecular packing becomes strengthened. As a result, with an optimized combination of these characteristics, DTP-IC-4Ph attains good solubility, high molar extinction coefficient, complementary absorption, suitable morphology, well-matched energy levels, as well as efficient charge dissociation and transport in blend film. Consequently, the DTP-IC-4Ph-based solar cells with a donor polymer, poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))] (PBDB-T) exhibit a promising power conversion efficiency of 10.37% without any additives, which is close to the best performance achieved in additive-free nonfullerene solar cells (NFSCs). The results demonstrate that the PAH building blocks have great potential for the construction of novel FREAs for efficient additive-free NFSCs.
AB - A series of polycyclic aromatic hydrocarbons (PAHs) with extended π-conjugated cores (from naphthalene, anthracene, pyrene, to perylene) are incorporated into nonfullerene acceptors for the first time. Four different fused-ring electron acceptors (FREAs), i.e., DTN-IC-2Ph, DTA-IC-3Ph, DTP-IC-4Ph, and DTPy-IC-5Ph, are prepared via simple and facile synthetic procedures, yielding a remarkable platform to study the structure–property relationship for nonfullerene solar cells. With the PAH core being extended systematically, the gradually redshifted absorption with enhanced molar extinction coefficient (ε) is realized, the energy level of the highest occupied molecular orbital is up-shifted, and the electron mobility is greatly enhanced. Meanwhile, the solubility decreases and the molecular packing becomes strengthened. As a result, with an optimized combination of these characteristics, DTP-IC-4Ph attains good solubility, high molar extinction coefficient, complementary absorption, suitable morphology, well-matched energy levels, as well as efficient charge dissociation and transport in blend film. Consequently, the DTP-IC-4Ph-based solar cells with a donor polymer, poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))] (PBDB-T) exhibit a promising power conversion efficiency of 10.37% without any additives, which is close to the best performance achieved in additive-free nonfullerene solar cells (NFSCs). The results demonstrate that the PAH building blocks have great potential for the construction of novel FREAs for efficient additive-free NFSCs.
KW - additive-free
KW - low-cost
KW - nonfullerene organic solar cells
KW - polycyclic aromatic hydrocarbon
KW - structure–property relationship
UR - http://www.scopus.com/inward/record.url?scp=85065291643&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065291643&partnerID=8YFLogxK
U2 - 10.1002/aenm.201803976
DO - 10.1002/aenm.201803976
M3 - Article
JO - Advanced Energy Materials
JF - Advanced Energy Materials
SN - 1614-6832
M1 - 1803976
ER -