Thermodynamically self-organized hole transport layers for high-efficiency inverted-planar perovskite solar cells

Wanjung Kim, Soyeon Kim, Sung Uk Chai, Myung Sun Jung, Jae Keun Nam, Jung Hyun Kim, Jong Hyeok Park

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is a popular and promising hole transport material for making efficient inverted-planar perovskite solar cells (IP-PSCs). However, the mismatch between the work function of conventional PEDOT:PSS and the valence band maximum of perovskite materials is still a challenge for efficient hole extraction. Here, we report systematic studies on the work-function modification and thermodynamic morphological evolution of PEDOT:PSS films by tuning the PSS/PEDOT ratio, along with its effects on the photovoltaic responses of IP-PSCs. We found that the open-circuit voltage (VOC) of an IP-PSC could be enhanced by controlling the work function of PEDOT:PSS. Furthermore, the optical transmittance of the PEDOT:PSS film could be maximized by controlling the morphological evolution, which will further increase the short-circuit current density (JSC) of the IP-PSC. The VOC and JSC of the IP-PSC with the optimized PEDOT:PSS composition increased from 0.88 to 0.93 V and from 17.11 to 20.77 mA cm-2, respectively, compared with an IP-PSC containing commercial PEDOT:PSS, which results in a power conversion energy that is greatly improved from 12.39 to 15.24%.

Original languageEnglish
Pages (from-to)12677-12683
Number of pages7
JournalNanoscale
Volume9
Issue number34
DOIs
Publication statusPublished - 2017 Sep 14

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Volatile organic compounds
Opacity
Open circuit voltage
Valence bands
Energy conversion
Short circuit currents
Perovskite
Perovskite solar cells
poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
Current density
Tuning
Thermodynamics
Chemical analysis
perovskite

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Kim, Wanjung ; Kim, Soyeon ; Chai, Sung Uk ; Jung, Myung Sun ; Nam, Jae Keun ; Kim, Jung Hyun ; Park, Jong Hyeok. / Thermodynamically self-organized hole transport layers for high-efficiency inverted-planar perovskite solar cells. In: Nanoscale. 2017 ; Vol. 9, No. 34. pp. 12677-12683.
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Thermodynamically self-organized hole transport layers for high-efficiency inverted-planar perovskite solar cells. / Kim, Wanjung; Kim, Soyeon; Chai, Sung Uk; Jung, Myung Sun; Nam, Jae Keun; Kim, Jung Hyun; Park, Jong Hyeok.

In: Nanoscale, Vol. 9, No. 34, 14.09.2017, p. 12677-12683.

Research output: Contribution to journalArticle

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