Significantly Increasing the Power Conversion Efficiency by Controlling the Orientation of Nonfullerene Small Molecular Acceptors via Side Chain Engineering

Solar RRL ◽  
2020 ◽  
Vol 4 (7) ◽  
pp. 2000234 ◽  
Author(s):  
Guang Zeng ◽  
Yue Xin ◽  
Bo Zhang ◽  
Jinyang Ouyang ◽  
Xiaoli Zhao ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Side Chain

scholarly journals Effect of main and side chain chlorination on the photovoltaic properties of benzodithiophene-alt-benzotriazole polymers

2020 ◽  
Vol 8 (43) ◽  
pp. 15426-15435
Author(s):  
Haijun Bin ◽  
Indunil Angunawela ◽  
Ruijie Ma ◽  
Asritha Nallapaneni ◽  
Chenhui Zhu ◽  
...  
Keyword(s):  
Energy Level ◽  
Charge Transport ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Side Chain ◽  
Photovoltaic Properties ◽  
Homo Energy Level

Introduction of chlorine in the conjugated side chains significantly improves open-circuit voltage and power conversion efficiency, benefiting from a lower HOMO energy level, well-balanced charge transport and superior nanoscale morphology.

Alkylthienyl substituted asymmetric 2D BDT and DTBT-based polymer solar cells with a power conversion efficiency of 9.2%

2018 ◽  
Vol 6 (5) ◽  
pp. 2371-2378 ◽  
Author(s):  
Chuantao Gu ◽  
Deyu Liu ◽  
Junyi Wang ◽  
Qingfen Niu ◽  
Chunyang Gu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Building Block ◽  
Light Harvesting ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Side Chain ◽  
First Time

An alkyl thiophene unit was employed for the first time as a side chain substituent on an asymmetric benzodithiophene (BDT) building block in the design of novel light-harvesting polymers.

A distorted lactam unit with intramolecular hydrogen bonds as the electron donor of polymer solar cells

2019 ◽  
Vol 7 (39) ◽  
pp. 12290-12296
Author(s):  
Hua-Chun Wang ◽  
Minrun Ren ◽  
Jian Cao ◽  
Hong-Bo Yin ◽  
Guichuan Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Hydrogen Bonds ◽  
Synergistic Effect ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Electron Donor ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Side Chain ◽  
Intramolecular Hydrogen

The device based on PBDT-BTP-OD with IT-M exhibited power conversion efficiency of up to 9.54% thanks to the synergistic effect of the distorted lactam motif and side-chain engineering.

Enhancing the photovoltaic performance of heteroheptacene-based nonfullerene acceptors through the synergistic effect of side-chain engineering and fluorination

2020 ◽  
Vol 8 (46) ◽  
pp. 24543-24552
Author(s):  
Dongdong Cai ◽  
Jianqi Zhang ◽  
Jin-Yun Wang ◽  
Yunlong Ma ◽  
Shuo Wan ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Side Chain ◽  
End Group ◽  
Nonfullerene Acceptor

The synergistic effect of end-group fluorination and side-chain engineering leads to a nonfullerene acceptor with an outstanding power conversion efficiency of 14.75%.

Synthesis of a side-chain hole transporting polymer through Mitsunobu post-functionalization for efficient inverted perovskite solar cells

2020 ◽  
Vol 11 (16) ◽  
pp. 2883-2888 ◽  
Author(s):  
Liuyuan Lan ◽  
Xiang Deng ◽  
Jie Zhang ◽  
Jingdong Luo ◽  
Alex K.-Y. Jen
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Fill Factor ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Side Chain ◽  
Hole Transporting ◽  
High Fill Factor ◽  
Post Functionalization

Mitsunobu post-functionalization was utilized to construct a new efficient dopant-free side-chain hole transporting polymer for inverted perovskite solar cells, exhibiting a power conversion efficiency of 17.75% and a high fill factor over 81%.

The Influence of Poly(phenyleneethynylene) Side Chain Structure on Single-Walled Carbon Nanotubes Hybrid Photovoltaic Cells

2008 ◽  
Vol 8 (7) ◽  
pp. 3343-3350 ◽  
Author(s):  
Jie Mao ◽  
Qian Liu ◽  
Shujing Wang ◽  
Xin Lv ◽  
Yi Huang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Power Conversion ◽  
Single Walled Carbon Nanotubes ◽  
Short Circuit Current ◽  
Side Chain ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

A novel poly(phenyleneethynylene)/single walled carbon nanotubes (SWNTs) donor-acceptor nanohybrid system was constructed based on the bulk heterojunction concept, and their photovoltaic (PV) properties were studied. Comparing with that of the pristine polymer poly(phenyleneethynylene) (PPE) device, the PV performance of the SWNTs/PPE hybrid is dramatically improved. The origin of open-circuit voltage (Voc) of the pristine polymer PPE device and SWNTs/PPE device was explained by metal-insulator-metal (MIM) diode model and pinning mechanism, respectively. Furthermore, incorporation of sensitizing groups to the side chain of PPE has great effect on the photovoltaic cell performance based on these hybrid materials and both the short-circuit current density (Isc) and power conversion efficiency are significantly enhanced. It is proposed that the main reason for the increase of short circuit current is due to efficient transfer of holes by sensitizer to PPE backbone and the transfer of electrons to the SWNTs. The power conversion efficiency is enhanced by ∼1 order magnitude to 0.031% for the device based on the PPE3 with anthracene sensitizer group on the side chain compared with that (4.2 × 10−3% for SWNTs/PPE1 and 6.2 × 10−3% for SWNTs/PPE2) of the device without anthracene sensitizer on the side chain.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

The Effect of Donor Molecular Structure on Power Conversion Efficiency of Small-Molecule-Based Organic Solar Cells

2019 ◽  
Vol 16 (3) ◽  
pp. 236-243 ◽  
Author(s):  
Hui Zhang ◽  
Yibing Ma ◽  
Youyi Sun ◽  
Jialei Liu ◽  
Yaqing Liu ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Molecular Design ◽  
Power Conversion ◽  
The Relationship

In this review, small-molecule donors for application in organic solar cells reported in the last three years are highlighted. Especially, the effect of donor molecular structure on power conversion efficiency of organic solar cells is reported in detail. Furthermore, the mechanism is proposed and discussed for explaining the relationship between structure and power conversion efficiency. These results and discussions draw some rules for rational donor molecular design, which is very important for further improving the power conversion efficiency of organic solar cells based on the small-molecule donor.

Enhanced efficacy of defect passivation and charge extraction for efficient perovskite photovoltaics with a small open circuit voltage loss

2019 ◽  
Vol 7 (15) ◽  
pp. 9025-9033 ◽  
Author(s):  
Jin-Feng Liao ◽  
Wu-Qiang Wu ◽  
Jun-Xing Zhong ◽  
Yong Jiang ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Charge Recombination ◽  
Open Circuit ◽  
Polymeric Semiconductor ◽  
Voltage Loss ◽  
Defect Passivation

A multifunctional 2D polymeric semiconductor was incorporated to provide surprisingly robust efficacy in grain boundary functionalization and defect passivation of perovskite, which suppresses charge recombination and thus affording an illustrious photovoltage of 1.16 V and power conversion efficiency of 21.1%.

scholarly journals High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhenrong Jia ◽  
Shucheng Qin ◽  
Lei Meng ◽  
Qing Ma ◽  
Indunil Angunawela ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Short Circuit ◽  
Power Conversion ◽  
High Power Conversion Efficiency ◽  
Device Structure ◽  
Narrow Bandgap

AbstractTandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.

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