Issue 15, 2017

A transparent poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) cathode for low temperature processed, metal-oxide free perovskite solar cells

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.

Graphical abstract: A transparent poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) cathode for low temperature processed, metal-oxide free perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
09 Dec 2016
Accepted
14 Mar 2017
First published
14 Mar 2017

J. Mater. Chem. A, 2017,5, 6974-6980

A transparent poly(3,4-ethylenedioxylenethiophene):poly(styrene sulfonate) cathode for low temperature processed, metal-oxide free perovskite solar cells

L. Chen, X. Xie, Z. Liu and E. Lee, J. Mater. Chem. A, 2017, 5, 6974 DOI: 10.1039/C6TA10588B

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