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).

A Ladder‐like Dopant‐free Hole‐Transporting Polymer for Hysteresis‐less High‐Efficiency Perovskite Solar Cells with High Ambient Stability

ChemSusChem ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 5058-5066
Author(s):  
Thanyarat Chawanpunyawat ◽  
Patteera Funchien ◽  
Praweena Wongkaew ◽  
Nakorn Henjongchom ◽  
Atthaporn Ariyarit ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Free Hole ◽  
Hole Transporting

scholarly journals Dopant-Free Hole Transporting Polymers for High Efficiency, Environmentally Stable Perovskite Solar Cells

2016 ◽  
Vol 6 (16) ◽  
pp. 1600502 ◽  
Author(s):  
Hsueh-Chung Liao ◽  
Teck Lip Dexter Tam ◽  
Peijun Guo ◽  
Yilei Wu ◽  
Eric F. Manley ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Free Hole ◽  
Hole Transporting

scholarly journals Soluble hexamethyl-substituted subphthalocyanine as a dopant-free hole transport material for planar perovskite solar cells

2018 ◽  
Vol 5 (8) ◽  
pp. 180617 ◽  
Author(s):  
Feng Wang ◽  
Xiaoyuan Liu ◽  
Ehsan Rezaee ◽  
Haiquan Shan ◽  
Yuxia Zhou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Perovskite Solar Cells ◽  
Chemical Properties ◽  
Hole Transport ◽  
Orbital Energy ◽  
Step Method ◽  
Free Hole ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Physical And Chemical

Boron subphthalocyanine (SubPc) has special physical and chemical properties, originating from its non-centrosymmetric, near-planar taper structure and large conjugated system; it can act as an alternative to the small molecule hole-transporting material 2,2′,7,7′-tetrakis-( N , N -di- p -methoxyphenylamine)-9,9′-spirobifluorene in perovskite solar cells (PSCs). To achieve a higher solubility in common organic solvents and a more suitable highest occupied molecular orbital energy level that aligns with the valence band of the perovskite material, a SubPc molecule with a hexamethyl substitution at its peripheral position (Me 6 -SubPc) was successfully designed and synthesized in a one-step method. Completely solution processed PSCs were fabricated with only a small hysteresis, a power conversion efficiency of 6.96% and V oc of 0.986 V.

Addition of adamantylammonium iodide to hole transport layers enables highly efficient and electroluminescent perovskite solar cells

2018 ◽  
Vol 11 (11) ◽  
pp. 3310-3320 ◽  
Author(s):  
Mohammad Mahdi Tavakoli ◽  
Wolfgang Tress ◽  
Jovana V. Milić ◽  
Dominik Kubicki ◽  
Lyndon Emsley ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Radiative Recombination ◽  
High Efficiency ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Hole Transport ◽  
Hole Transport Layers ◽  
Hole Transporting ◽  
Electro Luminescence

Non-radiative recombination losses are reduced drastically by addition of adamantylammonium iodide (ADAHI) into the hole transporting layer (HTL) in a perovskite solar cell, resulting in high efficiency (∼22%), increased Voc up to 1245 mV, and enhanced electro-luminescence EQE to 2.5%.

Simultaneous hole transport and defect passivation enabled by a dopant-free single polymer for efficient and stable perovskite solar cells

2020 ◽  
Vol 8 (40) ◽  
pp. 21036-21043
Author(s):  
Xiaoqing Jiang ◽  
Xuan Liu ◽  
Jiafeng Zhang ◽  
Sajjad Ahmad ◽  
Dandan Tu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Main Chain ◽  
Perovskite Solar Cells ◽  
Hole Transport ◽  
Side Chain ◽  
Free Hole ◽  
Defect Passivation ◽  
Hole Transporting

Dopant-free hole-transporting polymers with simultaneous main-chain hole extraction/transport and side-chain defect passivation are developed for efficient and stable perovskite solar cells.

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 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.

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