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  4. Atmospheric-pressure surface-diffusion dielectric-barrier discharge (SDDBD) plasma surface modification of PEDOT:PSS
 
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Atmospheric-pressure surface-diffusion dielectric-barrier discharge (SDDBD) plasma surface modification of PEDOT:PSS

Journal
Synthetic Metals
Journal Volume
256
Date Issued
2019
Author(s)
Li T.-E.
Tsai J.-H.
Hsu C.-C.  
JIAN-ZHANG CHEN  
I-CHUN CHENG  
DOI
10.1016/j.synthmet.2019.116114
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069836385&doi=10.1016%2fj.synthmet.2019.116114&partnerID=40&md5=0c608ff8d165581f1f39f419f1c9206c
Abstract
Atmospheric-pressure surface-diffusion dielectric-barrier discharge (SDDBD) plasma is used to treat poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) inside a nitrogen-filled glove box. The SDDBD-treated PEDOT:PSS is then used as the hole transport layer of an inverted planar perovskite solar cell (PSC). Electrons and reactive ions in plasma can react with PEDOT:PSS. The resistivity of PEDOT:PSS decreases and then increases as SDDBD treatment time increases. This trend well corresponds to the PEDOT/PSS ratio, as indicated by the change of the X-ray photoelectron spectroscopy (XPS) S2p binding energy peak area ratio upon SDDBD treatment. Plasma treatment could eliminate part of excess PSS on the surface to uncover the PEDOT phase and change the PEDOT/PSS ratio, thereby altering the resistivity and work function of PEDOT:PSS. This influences the charge transport and charge extraction of PSCs, leading to a PSC with improved cell efficiency and reduced hysteresis. The best efficiency of PSC is achieved with 30-s SDDBD treatment. ? 2019 Elsevier B.V.
Subjects
Dielectric barrier discharge
Hysteresis
PEDOT:PSS
Perovskite solar cell
Resistivity
Surface modification
Type
journal article

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