Fluorination on cyclopentadithiophene-based hole-transport materials for high-performance perovskite solar cells

Adugna, Gizachew Belay; Lee, Kun-Mu; Hsieh, Hsiao-Chi; Lu, Shih-I; Hsieh, Yu-Chien; Yang, June Hung; Chiu, Wei-Hao; Liau, Kang-Ling; Tao, Yu-Tai; Lin, Yan-Duo

doi:10.1039/d3cc04699k

Chem. Commun.

2023

DOI: 10.1039/d3cc04699k

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Fluorination on cyclopentadithiophene-based hole-transport materials for high-performance perovskite solar cells

Gizachew Belay Adugna,

Kun-Mu Lee,

Hsiao-Chi Hsieh

et al.

Abstract: A new class of fluorinated cyclopenta[2,1-b:3,4-b’]dithiophene (CPDT)-based small molecule, namely YC-oF, YC-mF, and YC-H, are demonstrated as the hole-transporting materials (HTMs) for high-performance perovskite solar cells (PSCs). PSCs employing YC-oF...

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Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells

Ramanujam,

Hsu,

Shi

et al. 2024

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Nickel oxide (NiOx) is commonly used as a holetransporting material (HTM) in p‐i‐n perovskite solar cells. However, the weak chemical interaction between the NiOx and CH3NH3PbI3 (MAPbI3) interface results in poor crystallinity, ineffective hole extraction, and enhanced carrier recombination, which are the leading causes for the limited stability and power conversion efficiency (PCE). Herein, two HTMs, TRUX‐D1 (N2,N7,N12‐tris(9,9‐dimethyl‐9H‐fluoren‐2‐yl)‐5,5,10,10,15,15‐hexaheptyl‐N2,N7,N12‐tris(4‐methoxyphenyl)‐10,15‐dihydro‐5H‐diindeno[1,2‐a:1′,2′‐c]fluorene‐2,7,12‐triamine) and TRUX‐D2 (5,5,10,10,15,15‐hexaheptyl‐N2,N7,N12‐tris(4‐methoxyphenyl)‐N2,N7,N12‐tris(10‐methyl‐10H‐phenothiazin‐3‐yl)‐10,15‐dihydro‐5H‐diindeno[1,2‐a:1′,2′‐c]fluorene‐2,7,12‐triamine), are designed with a rigid planar C3 symmetry truxene core integrated with electron‐donating amino groups at peripheral positions. The TRUX‐D molecules are employed as effective interfacial layer (IFL) materials between the NiOx and MAPbI3 interface. The incorporation of truxene‐based IFLs improves the quality of perovskite crystallinity, minimizes nonradiative recombination, and accelerates charge extraction which has been confirmed by various characterization techniques. As a result, the TRUX‐D1 exhibits a maximum PCE of up to 20.8% with an impressive long‐term stability. The unencapsulated device retains 98% of their initial performance following 210 days of aging in a glove box and 75.5% for the device after 80 days under ambient air condition with humidity over 40% at 25 °C.

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Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells

Ramanujam,

Hsu,

Shi

et al. 2024

Small

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show abstract

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Fluorination on cyclopentadithiophene-based hole-transport materials for high-performance perovskite solar cells

Abstract: A new class of fluorinated cyclopenta[2,1-b:3,4-b’]dithiophene (CPDT)-based small molecule, namely YC-oF, YC-mF, and YC-H, are demonstrated as the hole-transporting materials (HTMs) for high-performance perovskite solar cells (PSCs). PSCs employing YC-oF...

Cited by 1 publication

References 14 publications

Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells

Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells

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Fluorination on cyclopentadithiophene-based hole-transport materials for high-performance perovskite solar cells

Abstract: A new class of fluorinated cyclopenta[2,1-b:3,4-b’]dithiophene (CPDT)-based small molecule, namely YC-oF, YC-mF, and YC-H, are demonstrated as the hole-transporting materials (HTMs) for high-performance perovskite solar cells (PSCs). PSCs employing YC-oF...

Cited by 1 publication

References 14 publications

Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiOx‐Based Inverted Perovskite Solar Cells

Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiOx‐Based Inverted Perovskite Solar Cells

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Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells

Interfacial Layer Materials with a Truxene Core for Dopant‐Free NiO_x‐Based Inverted Perovskite Solar Cells