Printable MoOx Anode Interlayers for Organic Solar Cells

Advanced Materials
Qian KangJianhui Hou

Abstract

Currently, solution-processed MoOx anode interfacial layers (AILs) can only be fabricated by the spin-coating method in organic solar cells (OSCs), which severely limits their use in practical productions where large-area printing techniques are used. Herein, a facile method is demonstrated to prepare highly conductive MoOx (denoted EG:Mo) that can be processed by printing methods such as wire-bar and blade coatings. The EG:Mo films are prepared by depositing an aqueous solution containing ammonium heptamolybdate (VI) tetrahydrate (NMo) and ethylene glycol (EG) and annealing at 200 °C. UV-vis absorption and X-ray photoelectron spectroscopy measurements confirm that Mo (VI) can be reduced to Mo (V) by EG, resulting in the n-doped EG:Mo. Using the EG:Mo as AILs, an OSC based on a PB3T:IT-M active layer exhibits a power conversion efficiency (PCE) of 12.1%, which is comparable to that of the PEDOT:PSS modified devices. More importantly, EG:Mo AILs can be processed by wire-bar and blade-coating methods, and the corresponding devices show PCEs of 11.9% and 11.5%, respectively. Furthermore, the EG:Mo AIL is processed by wire-bar coating to fabricate a large area device (1.0 cm2 ), and a PCE of 10.1% is achieved.

References

Dec 9, 2008·Nature Materials·Marina SofosSamuel I Stupp
Aug 13, 2011·ACS Applied Materials & Interfaces·Claudio GirottoBarry P Rand
Aug 17, 2012·Nature·Michael GraetzelEdward H Sargent
Jan 29, 2013·Advanced Materials·Huiqiong ZhouAlan J Heeger
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May 29, 2015·Journal of the American Chemical Society·Li NianYuguang Ma
Nov 5, 2016·Advanced Science·Zhigang YinQingdong Zheng
May 18, 2017·Journal of the American Chemical Society·Wenchao ZhaoJianhui Hou

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Citations

Mar 28, 2021·Biosensors & Bioelectronics·Yahui WangTianli Yue
Aug 26, 2020·ACS Applied Materials & Interfaces·Soyeong JeongKwanghee Lee
Nov 6, 2020·ACS Applied Materials & Interfaces·Haitao XuYiwang Chen

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