Controlling the Decomposition of Hybrid Perovskite by a Dithienopyrrole-Based Hole Transport Layer toward Thermostable Solar Cells

Ren, Yutong; Cai, Yaohang; He, Lifei; Zheng, Aibin; Yuan, Yi; Zhang, Jing; Wang, Peng

doi:10.1021/acsmaterialslett.2c00045

Cited by 2 publications

(1 citation statement)

References 53 publications

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“…These results confirm that the DBT-based HTMs are thermally stable under the device fabrication condition. DBT-MOP is naturally amorphous compared to crystallinity of DBT-2F-MOP, which is advantageous for the development of homogeneous films and the stability of pero-SCs. − …”

Section: Resultsmentioning

confidence: 99%

Exploration of the Effect of Fluoridation on the Doping-Free Linear Dibenzothiophene-Based Hole-Transport Material Applied for Inverted Perovskite Solar Cells

Liu

Wang

Sun

et al. 2023

ACS Appl. Energy Mater.

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The utilization of hole-transport materials (HTMs) in perovskite solar cells (pero-SCs) is essential for the betterment of hole extraction and hole transport, both of which are critical for enhancing efficiency. To commercialize pero-SCs, the improvement in highly efficient and cost-effective HTMs without dopants is essential. As the HTMs used in inverted pero-SCs, two dibenzothiophene (DBT)-based small linear compounds, denoted DBT-MOP (with the methoxyphenyl in the peripheral) and DBT-2F-MOP (with fluorinated methoxyphenyl in one branch), are designed and synthesized in this study. Compared to fluorinated DBT-2F-MOP, DBT-MOP shows an amorphous state, increasing hole-transport mobility, and greater charge extraction; thus, the inverted device based on DBT-MOP exhibits a remarkable efficiency of 19.5%, while the devices based on DBT-2F-MOP show an efficiency only reaching up to 15.19%. The efficiency of the DBT-MOP-based devices is among the top efficiencies of the DBT-based HTMs. However, the introduction of the fluoride atom near the methoxy group harms the enhanced efficiency, which may originate from the crystallization of DBT-2F-MOP, leading to a rugged film morphology of DBT-2F-MOP, thus further affecting the crystallization of the on-top perovskite layer.

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Section: Resultsmentioning

confidence: 99%

Exploration of the Effect of Fluoridation on the Doping-Free Linear Dibenzothiophene-Based Hole-Transport Material Applied for Inverted Perovskite Solar Cells

Liu

Wang

Sun

et al. 2023

ACS Appl. Energy Mater.

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3D Conjugated Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells and Modules

Zhang,

Liu,

Ding

et al. 2024

Advanced Materials

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The orthogonal structure of the widely used hole transporting material (HTM) Spiro‐OMeTAD imparts isotropic conductivity and excellent film‐forming capability. However, inherently weak intra‐ and inter‐molecular π‐π interactions result in low intrinsic hole mobility. Herein, a novel arylamine derivative, termed FTPE‐ST, with a twist conjugated dibenzo[g,p]chrysene core and coplanar 3,4‐ethylenedioxythiophene (EDOT) as extended donor units, was designed to enhance intra‐ and inter‐molecular π‐π interactions, without compromising on solubility. The 3D configuration provides the material multi‐direction charge transport as well as excellent solubility even in 2‐methylanisole (2‐MA), and its large conjugated delocalization backbone endows the HTM with a high hole mobility (7.2 × 10−4 cm2V−1s−1). Moreover, the sulfur donors in the EDOT units coordinate to lead ions on the perovskite surface, leading to stronger interfacial interactions and the suppression of defects at the perovskite/HTM interface. As a result, perovskite solar cells (PSCs) employing FTPE‐ST as the HTM achieve a champion power conversion efficiency (PCE) of 25.21% with excellent long‐time stability, which is one of the highest PCEs for non‐spiro HTMs in n‐i‐p PSCs. In addition, the excellent film‐forming capacity of the HTM enables the fabrication of FTPE‐ST‐based large‐scale PSCs (1.0 cm2) and modules (29.0 cm2), which achieve PCEs of 24.21% (certificated 24.17%) and 21.27%, respectively.This article is protected by copyright. All rights reserved

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Controlling the Decomposition of Hybrid Perovskite by a Dithienopyrrole-Based Hole Transport Layer toward Thermostable Solar Cells

Cited by 2 publications

References 53 publications

Exploration of the Effect of Fluoridation on the Doping-Free Linear Dibenzothiophene-Based Hole-Transport Material Applied for Inverted Perovskite Solar Cells

Exploration of the Effect of Fluoridation on the Doping-Free Linear Dibenzothiophene-Based Hole-Transport Material Applied for Inverted Perovskite Solar Cells

3D Conjugated Hole Transporting Materials for Efficient and Stable Perovskite Solar Cells and Modules

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