Synthesis of atomically thin transition metal disulfides for charge transport layers in optoelectronic devices

ACS Nano
Ki Chang KwonSoo Young Kim

Abstract

Metal sulfides (MeS2) such as MoS2 and WS2 were used as charge transport layers in organic light-emitting diodes (OLEDs) and organic photovoltaic (OPV) cells in order to enhance the stability in air comparing to poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) ( PSS). MeS2 layers with a polycrystalline structure were synthesized by a chemical deposition method using uniformly spin-coated (NH4)MoS4 and (NH4)WS4 precursor solutions. The ultraviolet-ozone (UV-O3) treatment on MeS2 leads to the removal of the surface contaminants produced by the transfer process, resulting in a uniform surface and an increase of the work function. The maximum luminance efficiencies of the OLEDs with UV-O3-treated MoS2 and WS2 were 9.44 and 10.82 cd/A, respectively. The power conversion efficiencies of OPV cells based on UV-O3-treated MoS2 and WS2 were 2.96 and 3.08%, respectively. These values correspond to over 95% of those obtained with ( PSS) based devices. Furthermore, OLEDs and OPV cells based on MeS2 showed two to six times longer stability in air compared with PSS based devices. These results suggest that UV-O3-surface-treated MeS2 could be a promising candidate for a charge transport layer in optoelectronic devices.

References

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Citations

Feb 19, 2016·Chemical Society Reviews·Pei Cheng, Xiaowei Zhan
Aug 26, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Arup GhoraiSamit K Ray
Sep 21, 2016·ACS Applied Materials & Interfaces·Wang XingHui Huang
Jul 22, 2017·Advanced Materials·Gyu Jin ChoiSoo Young Kim
Oct 1, 2019·Advanced Materials·Yuanbao LinThomas D Anthopoulos
Jan 29, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Chandrasekar Perumal VeeramalaiTae Whan Kim
Apr 10, 2019·Polymers·Wenwu GuoSoo Young Kim
Mar 1, 2018·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Morasae SamadiAlireza Z Moshfegh
Jun 15, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Roberto SorrentinoUmberto Giovanella
May 31, 2018·ACS Applied Materials & Interfaces·Abdulhadee YakohArben Merkoçi
Aug 24, 2018·ACS Applied Materials & Interfaces·Young-Seok ShimHo Won Jang
Sep 9, 2021·Chemical Society Reviews·Sebastiano BellaniFrancesco Bonaccorso

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