Open AccessHigh performance organic solar cells based on ZnO: POT2T as an effective cathode interfacial layer
Author(s) -
Xiaoyang Du,
Xinrui Li,
Quanyi Chen,
Hui Lin,
Silu Tao
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/4/042015
Subject(s) - materials science , doping , cathode , organic solar cell , layer (electronics) , optoelectronics , conductivity , electron transport chain , energy conversion efficiency , electron mobility , active layer , electron , chemical engineering , nanotechnology , composite material , chemistry , polymer , engineering , biochemistry , thin film transistor , physics , quantum mechanics
Interface engineering in organic solar cells (OSCs) plays an important role in improving electron extraction and suppressing carrier recombination. In this article, the improvement of device was achieved by doping POT2T into ZnO as a new electron transport layer (ETL). For PTB7-Th: PC71BM system, the device fabricated by using ZnO as ETL achieved a PCE of 9.03% with a JSC of 17.33 mA/cm 2 , a VOC of 0.783V and a FF of 64.17%. After doping 5wt% POT2T in ZnO, the JSC increased to 18.01 mA/cm 2 and the FF increased slightly to 69.87%, as a result, the PCE increased to 9.84% with about 10% enhancement. The enhancement is attributed to the improved electron transport and conductivity, optimized ZnO surface morphology after adding POT2T, resulting in higher JSC and FF. Therefore, doping POT2T into ZnO as an ETL is a simple and effective method for obtaining high efficient OSCs.