Unraveling the Microstructure-Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small-Molecular Acceptors

Du, Xiaoyan1,2; Heumueller, Thomas1,2; Gruber, Wolfgang3,4; Almora, Osbel1,5; Classen, Andrej1,2; Qu, Jianfei6,7; He, Feng6,7; Unruh, Tobias3,4; Li, Ning1,2,8; Brabec, Christoph J.1,2

2020-02-28

10.1002/adma.201908305

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

As the power conversion efficiency (PCE) of organic solar cells (OSCs) has surpassed the 17% baseline, the long-term stability of highly efficient OSCs is essential for the practical application of this photovoltaic technology. Here, the photostability and possible degradation mechanisms of three state-of-the-art polymer donors with a commonly used nonfullerene acceptor (NFA), IT-4F, are investigated. The active-layer materials show excellent intrinsic photostability. The initial morphology, in particular the mixed region, causes degradation predominantly in the fill factor (FF) under illumination. Electron traps are formed due to the reorganization of polymers and diffusion-limited aggregation of NFAs to assemble small isolated acceptor domains under illumination. These electron traps lead to losses mainly in FF, which is in contradistinction to the degradation mechanisms observed for fullerene-based OSCs. Control of the composition of NFAs close to the thermodynamic equilibrium limit while keeping adequate electron percolation and improving the initial polymer and NFA ordering are of the essence to stabilize the FF in NFA-based solar cells, which may be the key tactics to develop next-generation OSCs with high efficiency as well as excellent stability.

bulk-heterojunction microstructure morphology stability nonfullerene acceptors organic solar cells photostability

SCI ; EI

英语

NI期刊

其他

111 project[D18023]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000516873200001

WILEY-V C H VERLAG GMBH

20201008259277

Heterojunctions ; Stability ; Degradation ; Efficiency ; Solvents ; Morphology ; Organic solar cells ; Solar power generation

Solar Power:615.2 ; Solar Cells:702.3 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Production Engineering:913.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Friedrich Alexander Univ Erlangen Nurnberg, I MEET, Dept Mat Sci & Engn, Martensstr 7, D-91058 Erlangen, Germany
2.Helmholtz Inst Erlangen Nurnberg HI ERN, Immerwahrstr 2, D-91058 Erlangen, Germany
3.Friedrich Alexander Univ Erlangen Nurnberg, Inst Crystallog & Struct Phys, Dept Phys, Staudtstr 3, D-91058 Erlangen, Germany
4.Friedrich Alexander Univ Erlangen Nurnberg FAU, Interdisciplinary Ctr Nanostruct Films IZNF, Ctr Nanoanal & Electron Microscopy CENEM, D-91058 Erlangen, Germany
5.Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Grad Sch Adv Optic Technol SAOT, D-91052 Erlangen, Germany
6.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
8.Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, 100 Sci Ave, Zhengzhou 450002, Peoples R China

Du, Xiaoyan,Heumueller, Thomas,Gruber, Wolfgang,et al. Unraveling the Microstructure-Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small-Molecular Acceptors[J]. ADVANCED MATERIALS,2020,32(16).

Du, Xiaoyan.,Heumueller, Thomas.,Gruber, Wolfgang.,Almora, Osbel.,Classen, Andrej.,...&Brabec, Christoph J..(2020).Unraveling the Microstructure-Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small-Molecular Acceptors.ADVANCED MATERIALS,32(16).

Du, Xiaoyan,et al."Unraveling the Microstructure-Related Device Stability for Polymer Solar Cells Based on Nonfullerene Small-Molecular Acceptors".ADVANCED MATERIALS 32.16(2020).