Premium
Impact of the Electron‐Transport Layer on the Performance of Solution‐Processed Small‐Molecule Organic Solar Cells
Author(s) -
Long Guankui,
Wan Xiangjian,
Kan Bin,
Hu Zhicheng,
Yang Xuan,
Zhang Yi,
Zhang Mingtao,
Wu Hongbing,
Huang Fei,
Su Shijian,
Cao Yong,
Chen Yongsheng
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402171
Subject(s) - organic solar cell , electron transport chain , materials science , small molecule , layer (electronics) , absorption (acoustics) , molecule , active layer , energy conversion efficiency , optoelectronics , polymer , work (physics) , electron , chemical engineering , nanotechnology , photochemistry , chemistry , composite material , physics , organic chemistry , biochemistry , thin film transistor , quantum mechanics , engineering , thermodynamics
Although the performance of polymer solar cells has been improved significantly recently through careful optimization with different interlayers for the same materials, more improvement is needed in this respect for small‐molecule‐based solar cells, particularly for the electron‐transport layers (ETLs). In this work, three different solution‐processed ETLs, PFN, ZnO nanoparticles, and LiF, were investigated and compared in the performance of small‐molecule‐based devices, and power conversion efficiencies (PCEs) of 8.32, 7.30, and 7.38 % were achieved, respectively. The mechanism for the ETL‐induced enhancement has been studied, and different ETLs have a significantly different impact on the device performance. The clearly improved performance of PFN is attributed to the combination of reduced bimolecular recombination and increased effective photon absorption in the active layer.