Sökning: id:"swepub:oai:DiVA.org:liu-166183" >
Asymmetric Electron...
Asymmetric Electron Acceptors for High-Efficiency and Low-Energy-Loss Organic Photovoltaics
-
- Li, Shuixing (författare)
- Zhejiang Univ, Peoples R China
-
- Zhan, Lingling (författare)
- Zhejiang Univ, Peoples R China
-
- Jin, Yingzhi (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
-
visa fler...
-
- Zhou, Guanqing (författare)
- Shanghai Jiao Tong Univ, Peoples R China
-
- Lau, Tsz-Ki (författare)
- Chinese Univ Hong Kong, Peoples R China
-
- Qin, Ran (författare)
- Zhejiang Univ, Peoples R China
-
- Shi, Minmin (författare)
- Zhejiang Univ, Peoples R China
-
- Li, Chang-Zhi (författare)
- Zhejiang Univ, Peoples R China
-
- Zhu, Haiming (författare)
- Zhejiang Univ, Peoples R China
-
- Lu, Xinhui (författare)
- Chinese Univ Hong Kong, Peoples R China
-
- Zhang, Fengling (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
-
- Chen, Hongzheng (författare)
- Zhejiang Univ, Peoples R China
-
visa färre...
-
(creator_code:org_t)
- 2020-05-11
- 2020
- Engelska.
-
Ingår i: Advanced Materials. - : WILEY-V C H VERLAG GMBH. - 0935-9648 .- 1521-4095. ; 32
- Relaterad länk:
-
https://liu.diva-por... (primary) (Raw object)
-
visa fler...
-
http://liu.diva-port...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Low energy loss and efficient charge separation under small driving forces are the prerequisites for realizing high power conversion efficiency (PCE) in organic photovoltaics (OPVs). Here, a new molecular design of nonfullerene acceptors (NFAs) is proposed to address above two issues simultaneously by introducing asymmetric terminals. Two NFAs, BTP-S1 and BTP-S2, are constructed by introducing halogenated indandione (A(1)) and 3-dicyanomethylene-1-indanone (A(2)) as two different conjugated terminals on the central fused core (D), wherein they share the same backbone as well-known NFA Y6, but at different terminals. Such asymmetric NFAs with A(1)-D-A(2) structure exhibit superior photovoltaic properties when blended with polymer donor PM6. Energy loss analysis reveals that asymmetric molecule BTP-S2 with six chlorine atoms attached at the terminals enables the corresponding devices to give an outstanding electroluminescence quantum efficiency of 2.3 x 10(-2)%, one order of magnitude higher than devices based on symmetric Y6 (4.4 x 10(-3)%), thus significantly lowering the nonradiative loss and energy loss of the corresponding devices. Besides, asymmetric BTP-S1 and BTP-S2 with multiple halogen atoms at the terminals exhibit fast hole transfer to the donor PM6. As a result, OPVs based on the PM6:BTP-S2 blend realize a PCE of 16.37%, higher than that (15.79%) of PM6:Y6-based OPVs. A further optimization of the ternary blend (PM6:Y6:BTP-S2) results in a best PCE of 17.43%, which is among the highest efficiencies for single-junction OPVs. This work provides an effective approach to simultaneously lower the energy loss and promote the charge separation of OPVs by molecular design strategy.
Ämnesord
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
Nyckelord
- asymmetric acceptors; charge separation; molecular design strategies; nonfullerene acceptors; organic photovoltaics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Li, Shuixing
-
Zhan, Lingling
-
Jin, Yingzhi
-
Zhou, Guanqing
-
Lau, Tsz-Ki
-
Qin, Ran
-
visa fler...
-
Shi, Minmin
-
Li, Chang-Zhi
-
Zhu, Haiming
-
Lu, Xinhui
-
Zhang, Fengling
-
Chen, Hongzheng
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Kemi
-
och Teoretisk kemi
- Artiklar i publikationen
-
Advanced Materia ...
- Av lärosätet
-
Linköpings universitet