Modification of Hole Transport Layers for Fabricating High Performance Non-fullerene Polymer Solar Cells
B. Hari Babu
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ǂThese authors contributed equally to this work.
Search for more papers by this authorChengkun Lyu
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ǂThese authors contributed equally to this work.
Search for more papers by this authorHongwei Zhang
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin, 130012 China
Search for more papers by this authorZhihao Chen
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
Search for more papers by this authorFenghong Li
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin, 130012 China
Search for more papers by this authorCorresponding Author
Lin Feng
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
E-mail: [email protected]Search for more papers by this authorXiao-Tao Hao
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria, 3010 Australia
Search for more papers by this authorB. Hari Babu
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ǂThese authors contributed equally to this work.
Search for more papers by this authorChengkun Lyu
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ǂThese authors contributed equally to this work.
Search for more papers by this authorHongwei Zhang
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin, 130012 China
Search for more papers by this authorZhihao Chen
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
Search for more papers by this authorFenghong Li
State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin, 130012 China
Search for more papers by this authorCorresponding Author
Lin Feng
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
E-mail: [email protected]Search for more papers by this authorXiao-Tao Hao
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100 China
ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, Victoria, 3010 Australia
Search for more papers by this authorSummary of main observation and conclusion
Interfacial engineering is expected to be a feasible strategy to improve the charge transport properties of the hole transport layer (HTL), which is of crucial importance to boost the device performance of organic solar cells (OSCs). In this study, two types of alcohol soluble materials, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ) and di-tetrabutylammoniumcis–bis(isothiocyanato)bis (2,2’-bipyridyl-4,4’-dicarboxylato) ruthenium(II) (N719) dye were selected as the dopant for HTL. The doping of F4-TCNQ and N719 dye in poly (ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) with and without integrating a graphene quantum-dots (G-QDs) layer has been explored in poly[[2,6′-4-8-di(5-ethylhexylthienyl)benzo[1,2-b:3,3-b]dithiophene][3-fluoro-2[(2-ethylhexyl)carbonyl]thieno[3,4-b]thio-phenediyl:(2,2′-((2Z,2′Z)-(((4,4,9, 9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b′]dithiophene-2,7-diyl)bis(4-((2-ethylhexyl)oxy)thiophene-5,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (PTB7-Th:IEICO-4F) OSCs. The power conversion efficiency of the non-fullerene OSCs has been increased to 10.12% from 8.84%. The influence of HTL modification on the nano-morphological structures and photophysical properties is analyzed based on the comparative studies performed on the control and modified devices. The use of chemical doping and bilayer strategy optimizes the energy level alignment, nanomorphology, hole mobility, and work-function of HTL, leading to considerable reduction of the leakage current and recombination losses. Our work demonstrates that the doping of HTL and the incorporation of G-QDs layer to constitute a bilayer HTL is an promising strategy to fabricate high performance non-fullerene polymer solar cells
Supporting Information
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