Highly efficient inverted organic solar cells using amino acid modified indium tin oxide as cathode

Journal Article · Mon Mar 24 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4870096· OSTI ID:22258591

Li, Aiyuan; Nie, Riming; Deng, Xianyu ^[1]; Wei, Huaixin; Li, Yanqing; Tang, Jianxin ^[2]; Zheng, Shizhao; Wong, King-Young ^[3]

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1. Research Center for Advanced Functional Materials and Devices, Shenzhen Key Laboratory of Advanced Materials, School of Materials Science and Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China)
2. Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123 (China)
3. Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong (China)

In this paper, we report that highly efficient inverted organic solar cells were achieved by modifying the surface of indium tin oxide (ITO) using an amino acid, Serine (Ser). With the modification of the ITO surface, device efficiency was significantly enhanced from 0.63% to 4.17%, accompanied with an open circuit voltage (Voc) that was enhanced from 0.30 V to 0.55 V. Ultraviolet and X-ray photoelectron spectroscopy studies indicate that the work function reduction induced by the amino acid modification resulting in the decreased barrier height at the ITO/organic interface played a crucial role in the enhanced performances.

• OSTI ID: 22258591
• Journal Information: Applied Physics Letters, Vol. 104, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATHODES
ELECTRIC POTENTIAL
INDIUM
ORGANIC SOLAR CELLS
SERINE
TIN OXIDES
ULTRAVIOLET RADIATION
WORK FUNCTIONS
X-RAY PHOTOELECTRON SPECTROSCOPY