A transparent poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) cathode for low temperature processed, metal-oxide free perovskite solar cells
- Authors
- Chen, Li; Xie, Xiaoyin; Liu, Zhihai; Lee, Eun-Cheol
- Issue Date
- 21-Apr-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.5, no.15, pp.6974 - 6980
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 5
- Number
- 15
- Start Page
- 6974
- End Page
- 6980
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/6218
- DOI
- 10.1039/c6ta10588b
- ISSN
- 2050-7488
- Abstract
- Low temperature processed, metal-oxide free planar perovskite solar cells (PSCs) were fabricated on glass and polyethylene terephthalate (PET) substrates using polyetherimide (PEI) modified poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) (PEDOT:PSS) as the cathode. The modification by PEI significantly changed the work function of PEDOT: PSS from -5.06 to -4.08 eV, yielding better electron transportation. The rigid cell on the glass substrate exhibited a high power conversion efficiency (PCE) of 12.42% without significant hysteresis and comparable to the PCE of PSCs with metal oxide cathodes. Moreover, the stability in air was higher by 32% than that of the devices with metal-oxide cathodes. The flexible device on the PET substrate exhibited a PCE of 9.73% and good bendability. Our results indicate that the flexibility of the PEDOT: PSS/PEI cathode is promising for use in large-scale roll-to-roll production of PSCs.
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