Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 15, Pages 6974-6980Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta10588b
Keywords
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Funding
- Department of Education of Jilin Province [2015-434]
- Basic Science Research Program through the National Research Foundation (NRF) - Ministry of Science, ICT and Future Planning [2016R1A2B2015389]
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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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