Hysteresis-Less CsPbI2Br Mesoscopic Perovskite Solar Cells with a High Open-Circuit Voltage Exceeding 1.3 v and 14.86% of Power Conversion Efficiency

Do Hun Kim, Jin Hyuck Heo, Sang Hyuk Im

Research output: Contribution to journalArticle

Abstract

High-performance and hysteresis-less mesoscopic CsPbI2Br perovskite solar cells (PSCs) are demonstrated by adapting hole-transporting materials (HTMs) with controlled highest occupied molecular orbital (HOMO) values. The used model HTMs are poly-3-hexylthiophene (P3HT), poly-triarylamine (P-TAA), poly-fluoren-8-triarylamine (PF8-TAA), and poly-indenofluoren-8-triarylamine (PIF8-TAA), and their HOMO energy levels position to -4.98, -5.09, -5.45, and -5.52 eV, respectively. By controlling the HOMO of the HTMs, the average open-circuit voltages of 25 mesoscopic CsPbI2Br PSCs are controllable from 1.11 ± 0.030 V for a P3HT HTM-based device to 1.17 ± 0.023, 1.21 ± 0.027, and 1.27 ± 0.028 V for P-TAA, PF8-TAA, and PIF8-TAA HTM-based devices. As a result, the PIF8-TAA HTM-based mesoscopic PSC exhibits the highest open-circuit voltage of 1.31 V and power conversion efficiency (PCE) of 14.20% for the forward scan condition and 14.86% for the reverse scan condition under 1 sun illumination (100 mW/cm2 AM 1.5G). In addition, the unencapsulated mesoscopic CsPbI2Br PSCs exhibited 10-14% of PCE degradation compared to their initial efficiency in maximum power point tracking under continuous 1 sun light soaking at 85 °C for 1000 h.

Original languageEnglish
Pages (from-to)19123-19131
Number of pages9
JournalACS Applied Materials and Interfaces
Volume11
Issue number21
DOIs
Publication statusPublished - 2019 May 29

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Open circuit voltage
Conversion efficiency
Hysteresis
Molecular orbitals
Sun
Electron energy levels
Perovskite solar cells
Lighting
Degradation

Keywords

  • cesium lead halide
  • high open-circuit voltage
  • perovskite
  • solar cells
  • thermal stability

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Hysteresis-Less CsPbI2Br Mesoscopic Perovskite Solar Cells with a High Open-Circuit Voltage Exceeding 1.3 v and 14.86% of Power Conversion Efficiency. / Kim, Do Hun; Heo, Jin Hyuck; Im, Sang Hyuk.

In: ACS Applied Materials and Interfaces, Vol. 11, No. 21, 29.05.2019, p. 19123-19131.

Research output: Contribution to journalArticle

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title = "Hysteresis-Less CsPbI2Br Mesoscopic Perovskite Solar Cells with a High Open-Circuit Voltage Exceeding 1.3 v and 14.86{\%} of Power Conversion Efficiency",
abstract = "High-performance and hysteresis-less mesoscopic CsPbI2Br perovskite solar cells (PSCs) are demonstrated by adapting hole-transporting materials (HTMs) with controlled highest occupied molecular orbital (HOMO) values. The used model HTMs are poly-3-hexylthiophene (P3HT), poly-triarylamine (P-TAA), poly-fluoren-8-triarylamine (PF8-TAA), and poly-indenofluoren-8-triarylamine (PIF8-TAA), and their HOMO energy levels position to -4.98, -5.09, -5.45, and -5.52 eV, respectively. By controlling the HOMO of the HTMs, the average open-circuit voltages of 25 mesoscopic CsPbI2Br PSCs are controllable from 1.11 ± 0.030 V for a P3HT HTM-based device to 1.17 ± 0.023, 1.21 ± 0.027, and 1.27 ± 0.028 V for P-TAA, PF8-TAA, and PIF8-TAA HTM-based devices. As a result, the PIF8-TAA HTM-based mesoscopic PSC exhibits the highest open-circuit voltage of 1.31 V and power conversion efficiency (PCE) of 14.20{\%} for the forward scan condition and 14.86{\%} for the reverse scan condition under 1 sun illumination (100 mW/cm2 AM 1.5G). In addition, the unencapsulated mesoscopic CsPbI2Br PSCs exhibited 10-14{\%} of PCE degradation compared to their initial efficiency in maximum power point tracking under continuous 1 sun light soaking at 85 °C for 1000 h.",
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AB - High-performance and hysteresis-less mesoscopic CsPbI2Br perovskite solar cells (PSCs) are demonstrated by adapting hole-transporting materials (HTMs) with controlled highest occupied molecular orbital (HOMO) values. The used model HTMs are poly-3-hexylthiophene (P3HT), poly-triarylamine (P-TAA), poly-fluoren-8-triarylamine (PF8-TAA), and poly-indenofluoren-8-triarylamine (PIF8-TAA), and their HOMO energy levels position to -4.98, -5.09, -5.45, and -5.52 eV, respectively. By controlling the HOMO of the HTMs, the average open-circuit voltages of 25 mesoscopic CsPbI2Br PSCs are controllable from 1.11 ± 0.030 V for a P3HT HTM-based device to 1.17 ± 0.023, 1.21 ± 0.027, and 1.27 ± 0.028 V for P-TAA, PF8-TAA, and PIF8-TAA HTM-based devices. As a result, the PIF8-TAA HTM-based mesoscopic PSC exhibits the highest open-circuit voltage of 1.31 V and power conversion efficiency (PCE) of 14.20% for the forward scan condition and 14.86% for the reverse scan condition under 1 sun illumination (100 mW/cm2 AM 1.5G). In addition, the unencapsulated mesoscopic CsPbI2Br PSCs exhibited 10-14% of PCE degradation compared to their initial efficiency in maximum power point tracking under continuous 1 sun light soaking at 85 °C for 1000 h.

KW - cesium lead halide

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KW - perovskite

KW - solar cells

KW - thermal stability

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