Pyridyl Functionalized Spiro [Fluorene-Xanthene] as Dopant Free Hole Transport Material for Stable Perovskite Solar Cells

2021 ◽  
Author(s):  
B Yadagiri ◽  
Towhid Hossain Chowdhury ◽  
Yulu He ◽  
Ryuji Kaneko ◽  
Ashraful Islam ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Critical Role ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Free Hole

The Hole Transport Materials (HTMs) play a critical role in perovskite solar cells (PSCs) for achieving high efficiency and stability. Herein, we have designed and synthesized a HTM named as...

scholarly journals Dopant-Free Hole Transport Materials with a Long Alkyl Chain for Stable Perovskite Solar Cells

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 935 ◽  
Author(s):  
Kai Wang ◽  
Haoran Chen ◽  
Tingting Niu ◽  
Shan Wang ◽  
Xiao Guo ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Alkyl Chain ◽  
Perovskite Solar Cells ◽  
Carbon Chain ◽  
Hole Transport ◽  
Original Performance ◽  
Free Hole ◽  
Alkyl Substitution ◽  
Hole Transporting

Hole transport materials are indispensable to high efficiency perovskite solar cells. Two new hole transporting materials (HTMs), named 4,4′-(9-nonyl-9H-carbazole-3,6-diyl)bis (N,N-bis(4-methoxyphenyl)aniline) (CZTPA-1) and 4,4′-(9-methyl-9H-carbazole-3,6-diyl)bis (N,N-bis(4-methoxyphenyl)aniline)(CZTPA-2), were developed by different alkyl substitution methods. The two compounds, containing a carbazole core and triphenylamine (TPA) groups with different lengths of the alkyl chain, were designed and synthesized through a two-step synthesis approach. The power conversion efficiency (PCE) was found to be affected by the length of the alkyl chain, reaching 7% for CZTPA-1 and 11% for CZTPA-2. Furthermore, the CZTPA-2 still maintained 89.7% of its original performance after 400 h. The proposed results demonstrate the effect of carbon chain substituents on the efficiency of perovskite solar cells (PSCs).

scholarly journals Dopant-Free π-Conjugated Hole Transport Materials for Highly Stable and Efficient Perovskite Solar Cells

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhifeng Deng ◽  
Shuaiwei Cui ◽  
Kaichang Kou ◽  
Dongxu Liang ◽  
Xin Shi ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Molecular Design ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Hole Transport ◽  
Free Hole ◽  
Hygroscopic Properties ◽  
Hybrid Perovskite

Current high-efficiency hybrid perovskite solar cells (PSCs) have been fabricated with doped hole transfer material (HTM), which has shown short-term stability. Doping applied in HTMs for PSCs can enhance the hole mobility and PSCs' power conversion efficiency, while the stability of PSCs will be significantly decreased due to inherent hygroscopic properties and chemical incompatibility. Development of dopant-free HTM with high hole mobility is a challenge and of utmost importance. In this review, a series of selected and typical π-conjugated dopant-free hole transport materials, mainly regarding small molecules, are reviewed, which could consequently help to further design high-performance dopant-free HTMs. In addition, an outline of the molecular design concept and also the perspective of ideal dopant-free HTMs were explored.

Structurally‐tuned benzo[1,2‐b:4,5:b'] dithiophene‐based polymer as a dopant‐free hole transport material for perovskite solar cells

2021 ◽  
Author(s):  
Henry Opoku ◽  
Ji Hyeon Lee ◽  
Benjamin Nketia‐Yawson ◽  
Hyungju Ahn ◽  
Jae‐Joon Lee ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Free Hole

scholarly journals Substituents interplay in piperidinyl-perylenediimide as dopant-free hole-selective layer for perovskite solar cells fabrication

2021 ◽  
Author(s):  
David Payno ◽  
Manuel Salado ◽  
Michael Andresini ◽  
David Gutiérrez-Moreno ◽  
Peng Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Performance Enhancement ◽  
Twist Angle ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Fine Tuning ◽  
Free Hole ◽  
Selective Layer ◽  
Energetic Level

AbstractThe charge selective layer is of significance for the fabrication of emerging photovoltaics, including perovskite-based solar cells. Molecular hole transport materials (HTMs) are being employed as charge transporters, owing to their synthetic molecular flexibility that allows the fine-tuning of their electro-optical properties. Typically, doping of HTMs is essential, but it is a trade-off between long-term durability and device performance. The energetic level of perylenediimides (PDIs) was altered by the position of the substituent. The substituent’s position influences the geometry of the PDI core, which can lose planarity, thus presenting a core twist angle between the two naphthalene subunits to find its application as hole-selective layers for fabrication. We have fabricated perovskite solar cells, with pristine PDI, and it gave a competitive performance. New design protocols for PDIs are required for aligned energetic levels, which will minimize recombination losses in solar cells, favoring a performance enhancement. Graphical abstract

scholarly journals Design and synthesis of dopant-free organic hole-transport materials for perovskite solar cells

2018 ◽  
Vol 54 (69) ◽  
pp. 9571-9574 ◽  
Author(s):  
Linqin Wang ◽  
Jinbao Zhang ◽  
Peng Liu ◽  
Bo Xu ◽  
Biaobiao Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Facile Synthesis ◽  
Free Hole ◽  
Design And Synthesis ◽  
Synthesis Routes

Two novel dopant-free hole-transport materials for perovskite solar cells with spiro[dibenzo[c,h]xanthene-7,9′-fluorene] skeletons were prepared via facile synthesis routes.

Annealing- and Doping-free Hole Transport Material for p-i-n Perovskite Solar Cells with Efficiency Achieving over 21%

2021 ◽  
pp. 133265
Author(s):  
Yikai Wang ◽  
Qiaoyun Chen ◽  
Jianfei Fu ◽  
Zhengxu Liu ◽  
Zhe Sun ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Free Hole
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