Hole-Transport Layer Molecular Weight and Doping Effects on Perovskite Solar Cell Efficiency and Mechanical Behavior

Inhwa Lee; Nicholas Rolston; Pierre Louis Brunner; Reinhold H. Dauskardt

doi:10.1021/acsami.9b05567

Hole-Transport Layer Molecular Weight and Doping Effects on Perovskite Solar Cell Efficiency and Mechanical Behavior

Inhwa Lee
, Nicholas Rolston
, Pierre Louis Brunner
, Reinhold H. Dauskardt

Research output: Contribution to journal › Article › peer-review

59 Scopus citations

Abstract

The effect of tuning molecular weight (M_n) in poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) to increase both mechanical properties of the film and electrical properties of perovskite solar cells is reported. Perovskite solar cell devices are fabricated to investigate the effect of M_n on power conversion efficiency. Moisture stability for various M_n is also studied in PTAA films exposed to mechanical loads in humid environments. Furthermore, cohesion and tensile tests are employed to determine the mechanical properties of PTAA, where higher M_n leads to more robust films. To elucidate the effect of M_n on the debonding kinetics, a viscoelastic fracture kinetic model is proposed as a function of M_n, and the debonding mechanism is found to be dependent on M_n. Finally, the effect of small-molecule-based dopants on the mechanical stability of PTAA is investigated.

Original language	English (US)
Pages (from-to)	23757-23764
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	26
DOIs	https://doi.org/10.1021/acsami.9b05567
State	Published - Jul 3 2019
Externally published	Yes

Keywords

PTAA
mechanical properties
molecular weight
perovskite solar cell
stability

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.9b05567

Cite this

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title = "Hole-Transport Layer Molecular Weight and Doping Effects on Perovskite Solar Cell Efficiency and Mechanical Behavior",

abstract = "The effect of tuning molecular weight (Mn) in poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) to increase both mechanical properties of the film and electrical properties of perovskite solar cells is reported. Perovskite solar cell devices are fabricated to investigate the effect of Mn on power conversion efficiency. Moisture stability for various Mn is also studied in PTAA films exposed to mechanical loads in humid environments. Furthermore, cohesion and tensile tests are employed to determine the mechanical properties of PTAA, where higher Mn leads to more robust films. To elucidate the effect of Mn on the debonding kinetics, a viscoelastic fracture kinetic model is proposed as a function of Mn, and the debonding mechanism is found to be dependent on Mn. Finally, the effect of small-molecule-based dopants on the mechanical stability of PTAA is investigated.",

keywords = "PTAA, mechanical properties, molecular weight, perovskite solar cell, stability",

author = "Inhwa Lee and Nicholas Rolston and Brunner, \{Pierre Louis\} and Dauskardt, \{Reinhold H.\}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

month = jul,

day = "3",

doi = "10.1021/acsami.9b05567",

language = "English (US)",

volume = "11",

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journal = "ACS Applied Materials and Interfaces",

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publisher = "American Chemical Society",

number = "26",

}

TY - JOUR

T1 - Hole-Transport Layer Molecular Weight and Doping Effects on Perovskite Solar Cell Efficiency and Mechanical Behavior

AU - Lee, Inhwa

AU - Rolston, Nicholas

AU - Brunner, Pierre Louis

AU - Dauskardt, Reinhold H.

PY - 2019/7/3

Y1 - 2019/7/3

N2 - The effect of tuning molecular weight (Mn) in poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) to increase both mechanical properties of the film and electrical properties of perovskite solar cells is reported. Perovskite solar cell devices are fabricated to investigate the effect of Mn on power conversion efficiency. Moisture stability for various Mn is also studied in PTAA films exposed to mechanical loads in humid environments. Furthermore, cohesion and tensile tests are employed to determine the mechanical properties of PTAA, where higher Mn leads to more robust films. To elucidate the effect of Mn on the debonding kinetics, a viscoelastic fracture kinetic model is proposed as a function of Mn, and the debonding mechanism is found to be dependent on Mn. Finally, the effect of small-molecule-based dopants on the mechanical stability of PTAA is investigated.

AB - The effect of tuning molecular weight (Mn) in poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) to increase both mechanical properties of the film and electrical properties of perovskite solar cells is reported. Perovskite solar cell devices are fabricated to investigate the effect of Mn on power conversion efficiency. Moisture stability for various Mn is also studied in PTAA films exposed to mechanical loads in humid environments. Furthermore, cohesion and tensile tests are employed to determine the mechanical properties of PTAA, where higher Mn leads to more robust films. To elucidate the effect of Mn on the debonding kinetics, a viscoelastic fracture kinetic model is proposed as a function of Mn, and the debonding mechanism is found to be dependent on Mn. Finally, the effect of small-molecule-based dopants on the mechanical stability of PTAA is investigated.

KW - PTAA

KW - mechanical properties

KW - molecular weight

KW - perovskite solar cell

KW - stability

UR - https://www.scopus.com/pages/publications/85068177802

UR - https://www.scopus.com/pages/publications/85068177802#tab=citedBy

U2 - 10.1021/acsami.9b05567

DO - 10.1021/acsami.9b05567

M3 - Article

C2 - 31184460

SN - 1944-8244

VL - 11

SP - 23757

EP - 23764

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 26

ER -

Hole-Transport Layer Molecular Weight and Doping Effects on Perovskite Solar Cell Efficiency and Mechanical Behavior

Abstract

Keywords

ASJC Scopus subject areas

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