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Organic Thin‐film Solar Cells Using Benzotrithiophene Derivatives Bearing Acceptor Units as Non‐Fullerene Acceptors
Author(s) -
Matsumoto Kouichi,
Yamashita Kazuhiro,
Sakoda Yuuki,
Ezoe Hinata,
Tanaka Yuki,
Okazaki Tatsuya,
Ohkita Misaki,
Tanaka Senku,
Aoki Yuki,
Kiriya Daisuke,
Kashimura Shigenori,
Maekawa Masahiko,
KurodaSowa Takayoshi,
Okubo Takashi
Publication year - 2021
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.202100178
Subject(s) - organic solar cell , fullerene , acceptor , chemistry , polymer solar cell , ternary operation , homo/lumo , energy conversion efficiency , solar cell , analytical chemistry (journal) , photochemistry , materials science , organic chemistry , molecule , optoelectronics , physics , polymer , computer science , programming language , condensed matter physics
New star‐shaped non‐fullerene acceptors (5 Z ,5′ Z ,5′′ Z )‐5,5′,5′′‐((benzo[1,2‐ b : 3,4‐ b′ : 5,6‐ b′′ ]trithiophene‐2,5,8‐triyltris(4‐octylthiophene‐5,2‐diyl))tris(methaneylylidene))tris(3‐octyl‐2‐thioxothiazolidin‐4‐one) ( 1 : BTT‐OT‐ORD) and 2,2′,2′′‐((5 Z ,5′ Z ,5′′ Z )‐((benzo[1,2‐ b : 3,4‐ b′ : 5,6‐ b′′ ]trithiophene‐2,5,8‐triyltris(4‐octylthiophene‐5,2‐diyl))tris(methaneylylidene))tris(3‐octyl‐4‐oxothiazolidine‐5,2‐diylidene))trimalononitrile ( 2 : BTT‐OT‐OTZDM) with a benzotrithiophene core, alkyl‐thiophen units, and acceptor units were designed and synthesized. The HOMO‐LUMO levels of 1 and 2 were determined by photoemission spectroscopy and UV‐Vis absorption spectroscopy. Binary blend and ternary blend bulk heterojunction (BHJ) organic solar cells with non‐fullerene acceptors 1 and 2 were fabricated with the inverted device structures of glass/ITO/ZnO/active_layer/MoO 3 /Ag. Both binary blend BHJ solar cells with 1 and 2 show lower J SC and larger V OC values than P3HT : PCBM solar cells. On the other hand, ternary blend BHJ organic solar cells, including 10 % of 1 , exhibited a larger power conversion efficiency than P3HT : PCBM solar cells because the J SC value was largely improved.