Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene)

Eui Hyuk Jung, Nam Joong Jeon, Eun Young Park, Chan Su Moon, Tae Joo Shin, Tae Youl Yang, Jun Hong Noh, Jangwon Seo

Research output: Contribution to journalLetter

44 Citations (Scopus)

Abstract

Perovskite solar cells typically comprise electron- and hole-transport materials deposited on each side of a perovskite active layer. So far, only two organic hole-transport materials have led to state-of-the-art performance in these solar cells 1 : poly(triarylamine) (PTAA) 2–5 and 2,2ʹ,7,7ʹ-tetrakis(N,N-di-p-methoxyphenylamine)-9,9ʹ-spirobifluorene (spiro-OMeTAD) 6,7 . However, these materials have several drawbacks in terms of commercialization, including high cost 8 , the need for hygroscopic dopants that trigger degradation of the perovskite layer 9 and limitations in their deposition processes 10 . Poly(3-hexylthiophene) (P3HT) is an alternative hole-transport material with excellent optoelectronic properties 11–13 , low cost 8,14 and ease of fabrication 15–18 , but so far the efficiencies of perovskite solar cells using P3HT have reached only around 16 per cent 19 . Here we propose a device architecture for highly efficient perovskite solar cells that use P3HT as a hole-transport material without any dopants. A thin layer of wide-bandgap halide perovskite is formed on top of the narrow-bandgap light-absorbing layer by an in situ reaction of n-hexyl trimethyl ammonium bromide on the perovskite surface. Our device has a certified power conversion efficiency of 22.7 per cent with hysteresis of ±0.51 per cent; exhibits good stability at 85 per cent relative humidity without encapsulation; and upon encapsulation demonstrates long-term operational stability for 1,370 hours under 1-Sun illumination at room temperature, maintaining 95 per cent of the initial efficiency. We extend our platform to large-area modules (24.97 square centimetres)—which are fabricated using a scalable bar-coating method for the deposition of P3HT—and achieve a power conversion efficiency of 16.0 per cent. Realizing the potential of P3HT as a hole-transport material by using a wide-bandgap halide could be a valuable direction for perovskite solar-cell research.

Original languageEnglish
Pages (from-to)511-515
Number of pages5
JournalNature
Volume567
Issue number7749
DOIs
Publication statusPublished - 2019 Mar 28

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Costs and Cost Analysis
Equipment and Supplies
perovskite
poly(3-hexylthiophene)
Solar System
Electron Transport
Humidity
Lighting
Light
Temperature
Research
ammonium bromide
Direction compound

ASJC Scopus subject areas

  • General

Cite this

Jung, E. H., Jeon, N. J., Park, E. Y., Moon, C. S., Shin, T. J., Yang, T. Y., ... Seo, J. (2019). Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene). Nature, 567(7749), 511-515. https://doi.org/10.1038/s41586-019-1036-3

Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene). / Jung, Eui Hyuk; Jeon, Nam Joong; Park, Eun Young; Moon, Chan Su; Shin, Tae Joo; Yang, Tae Youl; Noh, Jun Hong; Seo, Jangwon.

In: Nature, Vol. 567, No. 7749, 28.03.2019, p. 511-515.

Research output: Contribution to journalLetter

Jung, EH, Jeon, NJ, Park, EY, Moon, CS, Shin, TJ, Yang, TY, Noh, JH & Seo, J 2019, 'Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene)', Nature, vol. 567, no. 7749, pp. 511-515. https://doi.org/10.1038/s41586-019-1036-3
Jung EH, Jeon NJ, Park EY, Moon CS, Shin TJ, Yang TY et al. Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene). Nature. 2019 Mar 28;567(7749):511-515. https://doi.org/10.1038/s41586-019-1036-3
Jung, Eui Hyuk ; Jeon, Nam Joong ; Park, Eun Young ; Moon, Chan Su ; Shin, Tae Joo ; Yang, Tae Youl ; Noh, Jun Hong ; Seo, Jangwon. / Efficient, stable and scalable perovskite solar cells using poly(3-hexylthiophene). In: Nature. 2019 ; Vol. 567, No. 7749. pp. 511-515.
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AU - Shin, Tae Joo

AU - Yang, Tae Youl

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N2 - Perovskite solar cells typically comprise electron- and hole-transport materials deposited on each side of a perovskite active layer. So far, only two organic hole-transport materials have led to state-of-the-art performance in these solar cells 1 : poly(triarylamine) (PTAA) 2–5 and 2,2ʹ,7,7ʹ-tetrakis(N,N-di-p-methoxyphenylamine)-9,9ʹ-spirobifluorene (spiro-OMeTAD) 6,7 . However, these materials have several drawbacks in terms of commercialization, including high cost 8 , the need for hygroscopic dopants that trigger degradation of the perovskite layer 9 and limitations in their deposition processes 10 . Poly(3-hexylthiophene) (P3HT) is an alternative hole-transport material with excellent optoelectronic properties 11–13 , low cost 8,14 and ease of fabrication 15–18 , but so far the efficiencies of perovskite solar cells using P3HT have reached only around 16 per cent 19 . Here we propose a device architecture for highly efficient perovskite solar cells that use P3HT as a hole-transport material without any dopants. A thin layer of wide-bandgap halide perovskite is formed on top of the narrow-bandgap light-absorbing layer by an in situ reaction of n-hexyl trimethyl ammonium bromide on the perovskite surface. Our device has a certified power conversion efficiency of 22.7 per cent with hysteresis of ±0.51 per cent; exhibits good stability at 85 per cent relative humidity without encapsulation; and upon encapsulation demonstrates long-term operational stability for 1,370 hours under 1-Sun illumination at room temperature, maintaining 95 per cent of the initial efficiency. We extend our platform to large-area modules (24.97 square centimetres)—which are fabricated using a scalable bar-coating method for the deposition of P3HT—and achieve a power conversion efficiency of 16.0 per cent. Realizing the potential of P3HT as a hole-transport material by using a wide-bandgap halide could be a valuable direction for perovskite solar-cell research.

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