Incorporation of alkylthio side chains on benzothiadiazole-based non-fullerene acceptors enables high-performance organic solar cells with over 16% efficiency

2020 ◽  
Vol 8 (44) ◽  
pp. 23239-23247
Author(s):  
Andy Man Hong Cheung ◽  
Han Yu ◽  
Siwei Luo ◽  
Zhen Wang ◽  
Zhenyu Qi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Side Chains ◽  
First Time

This is the first time alkylthio chains are employed on Y6-like NFAs to achieve organic solar cells of power conversion efficiency higher than 16%.

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.

Replacing Cyano (−C≡N) Group to Design Environmentally Friendly Fused-ring Electron Acceptors

2021 ◽  
Author(s):  
Chuang Yao ◽  
Yezi Yang ◽  
Lei Li ◽  
Maolin Bo ◽  
Cheng Peng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Cyano Group ◽  
Power Conversion ◽  
Electron Acceptors ◽  
Fused Ring ◽  
Electron Withdrawing Group

Cyano-group (−C≡N) is an electron-withdrawing group, which has been widely used to construct high-performance fused-ring electron acceptors (FREAs). Benefiting from these FREAs, the power conversion efficiency of organic solar cells...

An acceptor–donor–acceptor type non-fullerene acceptor with an asymmetric backbone for high performance organic solar cells

2020 ◽  
Vol 8 (18) ◽  
pp. 6293-6298
Author(s):  
Cancan Jiao ◽  
Ziqi Guo ◽  
Binqiao Sun ◽  
Yuan-qiu-qiang Yi ◽  
Lingxian Meng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Acceptor Molecule ◽  
Donor Acceptor

An acceptor molecule with an asymmetric backbone, CC10, has been designed, which achieved a power conversion efficiency of 11.78%.

Chlorine-free processed high performance organic solar cells

RSC Advances ◽  
2014 ◽  
Vol 4 (32) ◽  
pp. 16681-16685 ◽  
Author(s):  
O. Synooka ◽  
K.-R. Eberhardt ◽  
H. Hoppe
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Chlorinated Solvents ◽  
Solvent System ◽  
Chlorinated Solvent

In this work, we demonstrate the successful replacement of a chlorinated solvent system based on a 1 : 1 mixture of chlorobenzene and ortho-dichlorobenzene with the chlorine-free solvent xylene, resulting in chlorine-free processing with a small amount of diiodooctane additive. In fact, the overall power conversion efficiency is improved from 6.71% for the chlorinated solvents to 7.15% for the chlorine-free solvent m-xylene.

scholarly journals Understanding the low voltage losses in high-performance non-fullerene acceptor-based organic solar cells

2021 ◽  
Author(s):  
Jakob Hofinger ◽  
Christoph Putz ◽  
Felix Mayr ◽  
Katarina Gugujonovic ◽  
Dominik Wielend ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Low Voltage ◽  
Power Conversion ◽  
Organic Photovoltaic

Despite the rapid increase in power conversion efficiency (PCE) of non-fullerene acceptor (NFA) based solar cells in recent years, organic photovoltaic (OPV) devices exhibit considerably larger voltage losses compared to...

scholarly journals Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1673
Author(s):  
Ruyi Xie ◽  
Li Song ◽  
Zhihui Zhao
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Performance ◽  
Fill Factor ◽  
Power Conversion ◽  
Vertical Direction ◽  
Side Chains ◽  
Aromatic Rings ◽  
Photovoltaic Properties

Using single-bonded and fused aromatic rings are two methods for extending the π-conjugation in the vertical direction of benzo [1,2-b:4,5-b′] dithiophene (BDT) unit. To investigate which method is more efficient in nonfullerene systems, two novel polymers based on alkylthionaphthyl and alkylthiobiphenyl substituted BDT named PBDTNS-FTAZ and PBDTBPS-FTAZ are designed and synthesized. Two polymers only exhibit small differences in structure, but huge differences in photovoltaic properties. They are studied by blended with 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)indanone)-5,5,11,11-tetrakis(4-hexylphenyl)dithieno [2,3-d’:2,3’-d’]-s-indaceno [1,2-b:5,6-b’] dithiophene (ITIC). The device based on PBDTNS-FTAZ:ITIC showed the best power conversion efficiency (PCE) of 9.63% with the Voc of 0.87 V, a Jsc of 18.06 mA/cm2 and a fill factor of 61.21%, while the PBDTBPS-FTAZ:ITIC only exhibit a maximum PCE of 7.79% with a Voc of 0.86 V, a Jsc of 16.24 mA/cm2 and a relatively low fill factor of 55.92%. Therefore, extending π-conjugation with alkylthionaphthyl is more effective against constructing nonfullerene solar cells.

Solution-processed indium oxide electron transporting layers for high-performance and photo-stable perovskite and organic solar cells

Nanoscale ◽  
2017 ◽  
Vol 9 (42) ◽  
pp. 16305-16312 ◽  
Author(s):  
Seokhyun Yoon ◽  
Si Joon Kim ◽  
Harrison S. Kim ◽  
Joon-Suh Park ◽  
Il Ki Han ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Indium Oxide ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
High Performance ◽  
Power Conversion ◽  
Perovskite Solar Cell

Pin-hole free and conductive In2O3 electron transporting layers lead to a power conversion efficiency of 14.63% in a perovskite solar cell and 3.03% in an organic solar cell.

A high performance three-dimensional thiophene-annulated perylene dye as an acceptor for organic solar cells

2016 ◽  
Vol 52 (77) ◽  
pp. 11500-11503 ◽  
Author(s):  
Wei Fan ◽  
Ningning Liang ◽  
Dong Meng ◽  
Jiajing Feng ◽  
Yan Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Three Dimensional ◽  
Higher Power ◽  
Perylene Dye

A new three-dimensional thiophene-annulated perylene dye, namely tetra-PBI-S, was designed and synthesized. Organic solar cells based on the tetra-PBI-S acceptor show a much higher power conversion efficiency than tetra-PBI based solar cells.

Solution-processable n-doped graphene-containing cathode interfacial materials for high-performance organic solar cells

2019 ◽  
Vol 12 (11) ◽  
pp. 3400-3411 ◽  
Author(s):  
Fei Pan ◽  
Chenkai Sun ◽  
Yingfen Li ◽  
Dianyong Tang ◽  
Yingping Zou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Work Function ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Doped Graphene ◽  
Interfacial Material ◽  
Solution Processable

Solution-processable n-doped graphene-containing cathode interfacial material with a low work function demonstrates 16.52% power conversion efficiency in organic solar cells.

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