Improving the performance of perovskite solar cells with glycerol-doped PEDOT:PSS buffer layer

doi:10.1088/1674-1056/25/2/028402

Abstract

In this paper, we investigate the effects of glycerol doping on transmittance, conductivity and surface morphology of poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)) (PEDOT:PSS) and its influence on the performance of perovskite solar cells．The conductivity of PEDOT:PSS is improved obviously by doping glycerol. The maximum of the conductivity is 0.89 S/cm when the doping concentration reaches 6 wt%, which increases about 127 times compared with undoped. The perovskite solar cells are fabricated with a configuration of indium tin oxide (ITO)/PEDOT:PSS/CH₃NH₃PbI₃/PC₆₁BM/Al, where PEDOT:PSS and PC₆₁BM are used as hole and electron transport layers, respectively. The results show an improvement of hole charge transport as well as an increase of short-circuit current density and a reduction of series resistance, owing to the higher conductivity of the doped PEDOT:PSS. Consequently, it improves the whole performance of perovskite solar cell. The power conversion efficiency (PCE) of the device is improved from 8.57% to 11.03% under AM 1.5 G (100 mW/cm² illumination) after the buffer layer has been modified.

Keywords: glycerol PEDOT:PSS perovskite solar cells

Received: 25 June 2015
Revised: 22 October 2015
Accepted manuscript online:

PACS:	84.60.Jt	(Photoelectric conversion)
	88.40.H-	(Solar cells (photovoltaics))
	84.60.Bk	(Performance characteristics of energy conversion systems; figure of merit)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 61264002, 61166002, 91333206, and 51463011), the Natural Science Foundation of Gansu Province, China (Grant No. 1308RJZA159), the New Century Excellent Talents in University of Ministry of Education of China (Grant No. NCET-13-0840), the Research Project of Graduate Teacher of Gansu Province, China (Grant No. 2014A-0042), and the Postdoctoral Science Foundation from Lanzhou Jiaotong University, China.

Corresponding Authors: Jian-Feng Li
E-mail: ljfpyc@163.com

Cite this article:

Jian-Feng Li(李建丰), Chuang Zhao(赵创), Heng Zhang(张恒), Jun-Feng Tong(同军锋), Peng Zhang(张鹏), Chun-Yan Yang(杨春燕), Yang-Jun Xia(夏养君), Duo-Wang Fan(范多旺) Improving the performance of perovskite solar cells with glycerol-doped PEDOT:PSS buffer layer 2016 Chin. Phys. B 25 028402

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Improving the performance of perovskite solar cells with glycerol-doped PEDOT:PSS buffer layer

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