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Solution‐Processable Ultrathin Black Phosphorus as an Effective Electron Transport Layer in Organic Photovoltaics
Author(s) -
Lin Shenghuang,
Liu Shenghua,
Yang Zhibin,
Li Yanyong,
Ng Tsz Wai,
Xu Zaiquan,
Bao Qiaoliang,
Hao Jianhua,
Lee ChunSing,
Surya Charles,
Yan Feng,
Lau Shu Ping
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201503273
Subject(s) - materials science , organic solar cell , black phosphorus , photovoltaics , layer (electronics) , van der waals force , optoelectronics , electron transport chain , nanotechnology , electron , photovoltaic system , polymer , composite material , molecule , organic chemistry , chemistry , electrical engineering , biochemistry , engineering , physics , quantum mechanics
2D van der Waals crystals, possessing excellent electronic and physical properties, have been intriguing building blocks for organic optoelectronic devices. Most of the 2D materials are served as hole transport layers in organic devices. Here,it is reported that solution exfoliated few layers black phosphorus (BP) can be served as an effective electron transport layer (ETL) in organic photovoltaics (OPVs) for the first time. The power conversion efficiencies (PCEs) of the BP‐incorporated OPVs can be improved to 8.18% in average with the relative enhancement of 11%. The incorporation of BP flakes with the optimum thickness of ≈10 nm can form cascaded band structure in OPVs, which can facilitate electron transport and enhance the PCEs of the devices. This study opens an avenue in using solution exfoliated BP as a highly efficient ETL for organic optoelectronics.