Extension of stability in organic photovoltaic cells using UV/ozone-treated graphene sheets

Kwon, Ki Chang; Dong, Wan Jae; Jung, Gwan Ho; Ham, Juyoung; Lee, Jong‐Lam; Kim, Soo Young

doi:10.1016/j.solmat.2012.10.017

Cited by 41 publications

(27 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5(b). The energy levels of ITO, PEDOT:PSS, P3HT:PCBM, LiF/Al were obtained from other previous reports 34, 35. After performing the UVO treatment on WS 2 , the work‐function of WS 2 reached 5.1 eV, decreasing the hole‐extraction barrier and improving the device performance.…”

Section: Resultsmentioning

confidence: 99%

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells

Nguyen

Kim

2014

Physica Rapid Research Ltrs

Self Cite

View full text Add to dashboard Cite

WS2 nanosheets obtained through a simple sonication exfoliation method are employed as a hole‐extraction layer to improve the efficiency of organic photovoltaic cells (OPVs). A reduction in the wavenumber difference in the Raman spectra, the appearance of a UV absorption peak, and atomic force microscopy images indicate that WS2 nanosheets are formed through the sonication method. The power conversion efficiency (PCE) values of OPVs with and without untreated WS2 layers are both 1.84%. After performing a UV‐ozone (UVO) treatment on the WS2 surface for 15 min, the PCE increases to 2.4%. Synchrotron radiation photoelectron spectroscopy data show that the work function of WS2 increases from 4.9 eV to 5.1 eV upon UVO treat‐ ment, suggesting that the increase in the PCE value is caused by the band alignment. Upon inserting poly(3,4‐ethylenedioxythiophene):poly(styrene‐sulfonate) (PEDOT: PSS) between the WS2 and the active layer, the PCE value of the OPV increases to 3.07%, which is superior to that of the device employing only PEDOT:PSS (2.87%). Therefore, it is considered that the use of UVO‐treated WS2 is able to improve the performance of OPV cells. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Section: Resultsmentioning

confidence: 99%

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells

Nguyen

Kim

2014

Physica Rapid Research Ltrs

Self Cite

View full text Add to dashboard Cite

show abstract

“…The observed cell parameter under AM1.5 illumination are listed in Table III. [103] and silver nanowires [104,105]. All these alternatives can be fabricated via ink-jet printing, screen printing, slot-die coating, or similar solution based processes on glass or on flexible PET substrates.…”

Section: Current-voltage Dependence For Identical P3ht/pcbm Devices Cmentioning

confidence: 99%

Carbon nanotubes for organic/inorganic hybrid solar cells

Arici

Karazhanov

2016

Materials Science in Semiconductor Processing

View full text Add to dashboard Cite

show abstract

“…C1s XPS spectra of the GOS, PANI, and G40P are shown in Figure . The spectral line shape was simulated using a suitable combination of Gaussian and Lorentzian functions . The peaks of the CC bond, CO bond, a carbonyl group (CO), and COOH group were observed at 284.4, 286.5, 287.9, and 288.6 eV for the GO sample .…”

Section: Resultsmentioning

confidence: 99%

“…The spectral line shape was simulated using a suitable combination of Gaussian and Lorentzian functions . The peaks of the CC bond, CO bond, a carbonyl group (CO), and COOH group were observed at 284.4, 286.5, 287.9, and 288.6 eV for the GO sample . Moreover, the peaks of the CC bond, CN bond, CN + bond, and CO group were observed at 284.5, 285.5, 286.7, and 287.9 eV for the PANI sample .…”

Section: Resultsmentioning

confidence: 99%

Graphene oxide sheet–polyaniline nanohybrids for enhanced photovoltaic performance of dye‐sensitized solar cells

Hsu

Tseng

Lee

2013

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

In this study, photovoltaic (PV) properties of dyesensitized solar cells (DSSCs) incorporated with graphene oxide nanosheet-polyaniline (GOS-PANI) nanohybrid/poly(ethylene oxide) (PEO) blend gel electrolytes were investigated. Chemical structure and composition of GOS-PANI nanohybrids were characterized by Raman spectroscopy and X-ray photoelectron spectroscopy. The images of transmission electron microscopy revealed that PANI nanorods were anchored to the single-layered GOS for the GOS-PANI nanohybrids. Ionic conductivities of the GOS-PANI/PEO-based gel electrolytes were measured using a conductivity meter. The electrochemical catalytic activities of the GOS-PANI nanohybrids were determined through cyclic voltammetry. These GOS-PANI nanohybrids were served as the extended electron transfer materials and catalyst for the electrochemical reduction of I 3 2 . Due to the enhancement of the ionic conductivity and electrochemical cat-alytic activity of the gel electrolyte, better PV performance was observed for the DSSCs based on the GOS-PANI containing electrolytes as compared to the pristine PEO electrolyte-based DSSC sample. Moreover, PV performances of the GOS-PANI/ PEO-based DSSCs were closely related to the PANI content of GOS-PANI nanohybrids. The highest photo-energy conversion efficiency (5.63%) was obtained for an optimized GOS-PANI/PEO (5:95, w/w) blend gel electrolyte-based DSSC sample.

show abstract

Extension of stability in organic photovoltaic cells using UV/ozone-treated graphene sheets

Cited by 41 publications

References 40 publications

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells

Carbon nanotubes for organic/inorganic hybrid solar cells

Graphene oxide sheet–polyaniline nanohybrids for enhanced photovoltaic performance of dye‐sensitized solar cells

Contact Info

Product

Resources

About

Extension of stability in organic photovoltaic cells using UV/ozone-treated graphene sheets

Cited by 41 publications

References 40 publications

UV/ozone‐treated WS2 hole‐extraction layer in organic photovoltaic cells

UV/ozone‐treated WS2 hole‐extraction layer in organic photovoltaic cells

Carbon nanotubes for organic/inorganic hybrid solar cells

Graphene oxide sheet–polyaniline nanohybrids for enhanced photovoltaic performance of dye‐sensitized solar cells

Contact Info

Product

Resources

About

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells

UV/ozone‐treated WS₂ hole‐extraction layer in organic photovoltaic cells