Bilayer Quasiplanar Heterojunction Organic Solar Cells with a Co-Acceptor: A Synergistic Approach for Stability and Efficiency

Lai, Xue1,2,3; Lai, Hanjian1,2,3; Du, Mengzhen4; Chen, Hui2,3,5; Qiu, Dongsheng2,3; Zhu, Yulin2,3; Pu, Mingrui2,3; Zhu, Yiwu2,3; Zhou, Erjun4; He, Feng2,3,6

2022-08-01

10.1021/acs.chemmater.2c01604

CHEMISTRY OF MATERIALS   Impact Factor & Quartile

0897-4756

1520-5002

Quasiplanar heterojunction (Q-PHJ) organic solar cells (OSCs) with a bilayer-type D/A phase distribution and a nanoscale bulk heterojunction (BHJ) region at the D/A interface have attracted significant attention for their efficient exciton dissociation and charge transfer to meet the demand for more efficient and stable photovoltaic devices. Herein, we demonstrate a co-acceptor-based Q-PHJ (co-Q-PHJ) OSC with enhanced crystallinity achieved by using two structurally compatible acceptors (BTIC-BO4Cl-beta delta and ITCC). With a higher lowest unoccupied molecular orbital energy level and a wider band gap than BTIC-BO4Cl-beta delta, ITCC can broaden the absorption range and support charge transfer for co-Q-PHJ devices. Consequently, when combined with D18 donor, the co-Q-PHJ OSCs fabricated with separately depositing donor and acceptor layers by using orthogonal solvents achieved a remarkable efficiency of 17.3%, which is much higher than that of the control ternary BHJ OSCs (16.0%). More importantly, the co-Q-PHJ device has a T80 lifetime of 612 h tested under 50 degrees C which is 5 times longer than that of the BHJ control device (similar to 110 h). The obvious increase in thermal stability and efficiency makes the co-Q-PHJ solar cells the basis of a practical strategy for the utilization of multi-component materials with strong crystallinities in such a real bilayer device structure.

SCI ; EI

English

Corresponding

National Natural Science Foundation of China["21733005","21975115"] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Fundamental Research Program["J C Y J 2 0 1 9 0 8 0 9 1 6 3 0 1 1 5 4 3","JCYJ20200109140801751","JCYJ20210324120010028"] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007]

Chemistry ; Materials Science

Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:000849734900001

AMER CHEMICAL SOC

20223712711454

Charge transfer ; Crystallinity ; Energy gap ; Heterojunctions ; Molecular orbitals ; Solar power generation

Solar Power:615.2 ; Solar Cells:702.3 ; Semiconductor Devices and Integrated Circuits:714.2 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Atomic and Molecular Physics:931.3 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
4.Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
5.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
6.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalysis, Shenzhen 518055, Peoples R China

Lai, Xue,Lai, Hanjian,Du, Mengzhen,et al. Bilayer Quasiplanar Heterojunction Organic Solar Cells with a Co-Acceptor: A Synergistic Approach for Stability and Efficiency[J]. CHEMISTRY OF MATERIALS,2022.

Lai, Xue.,Lai, Hanjian.,Du, Mengzhen.,Chen, Hui.,Qiu, Dongsheng.,...&He, Feng.(2022).Bilayer Quasiplanar Heterojunction Organic Solar Cells with a Co-Acceptor: A Synergistic Approach for Stability and Efficiency.CHEMISTRY OF MATERIALS.

Lai, Xue,et al."Bilayer Quasiplanar Heterojunction Organic Solar Cells with a Co-Acceptor: A Synergistic Approach for Stability and Efficiency".CHEMISTRY OF MATERIALS (2022).