Enhanced Photovoltaic Performance by Synergistic Effect of Chlorination and Selenophene pi-Bridge

Chao, Pengjie1,2,4; Guo, Meigen1,2,3; Zhu, Yulin1,2; Chen, Hui1,2; Pu, Mingrui1,2; Huang, Hsin-Hsiang5; Meng, Hong4; Yang, Chuluo3; He, Feng1,2

2020-04-28

10.1021/acs.macromol.0c00405

MACROMOLECULES   影响因子和分区

0024-9297

1520-5835

In the rapid innovation of organic solar cells, polymer donor plays a significant role in achieving high power conversion efficiencies (PCEs). The strong intermolecular interactions and deep highest occupied molecular orbitals (HOMOs) of donor polymers will facilitate the favorable phase separation and high open-circuit voltage (V-oc), resulting in the dramatic improvement of device performance. Herein, combined chlorination of 4,8-bis(thiophene-2-yl)-benzo[1,2-b:4,5-b']-dithiophene (T-BDT) and selenophene pi-bridges, a new polymer donor, named PBBSe-Cl, is designed and synthesized. Compared to its parent polymer without chlorine substitution and pi-bridge (named PBB), PBBSe-Cl exhibits much stronger absorption, better molecular planarity, and improved molecular aggregations. Moreover, PBBSe-Cl shows favorable phase separation and bicontinuous interpenetrating network when blending with acceptor Y6. As a result, the inverted device based on PBBSe-Cl achieves a decent PCE of 14.44%, with synchronously improved short-circuit current density (J(sc)) of 24.07 mA cm(-2) and fill factor (FF) of 73.16%. However, its parent polymers PBB and PBBSe-H only present a relatively low device performance. In addition, a very low energy loss (E-loss) of 0.51 eV is realized for PBBSe-Cl-based devices. This investigation proves that introducing chlorine atoms on the conjugated side chains and selenophene it-bridges will stepwise increase the polymer solar cell efficiency due to the simultaneous enhancement of device current density and fill factor. The proper usage of chlorination and selenophene pi-bridge is a facile and efficient strategy for high-performance solar conversion materials.

SCI ; EI

英语

NI论文

第一 ; 通讯

National Natural Science Foundation of China[21975115][51773087][21733005] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Shenzhen Fundamental Research Program[JCYJ20170817111214740][JCYJ20180302180238419][KQJSCX20180319114442157] ; Shenzhen Nobel Prize Scientists Laboratory Project[C17213101] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences[DE-AC02-06CH11357]

Polymer Science

Polymer Science

WOS:000529885700014

AMER CHEMICAL SOC

20201808588979

Blending ; Chlorination ; Chlorine ; Chlorine compounds ; Conjugated polymers ; Molecular orbitals ; Open circuit voltage ; Organic solar cells ; Phase separation ; Photovoltaic effects ; Selenium compounds

Energy Losses (industrial and residential):525.4 ; Thermodynamics:641.1 ; Solar Cells:702.3 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Atomic and Molecular Physics:931.3

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
3.Shenzhen Univ, Shenzhen Key Lab Polymer Sci & Technol, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China
4.Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China
5.Natl Taiwan Univ, Dept Mat Sci & Engn, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

Chao, Pengjie,Guo, Meigen,Zhu, Yulin,et al. Enhanced Photovoltaic Performance by Synergistic Effect of Chlorination and Selenophene pi-Bridge[J]. MACROMOLECULES,2020,53(8):2893-2901.

Chao, Pengjie.,Guo, Meigen.,Zhu, Yulin.,Chen, Hui.,Pu, Mingrui.,...&He, Feng.(2020).Enhanced Photovoltaic Performance by Synergistic Effect of Chlorination and Selenophene pi-Bridge.MACROMOLECULES,53(8),2893-2901.

Chao, Pengjie,et al."Enhanced Photovoltaic Performance by Synergistic Effect of Chlorination and Selenophene pi-Bridge".MACROMOLECULES 53.8(2020):2893-2901.