A complementary absorption small molecule for efficient ternary organic solar cells

2016 ◽  
Vol 4 (14) ◽  
pp. 5288-5293 ◽  
Author(s):  
Liangang Xiao ◽  
Ke Gao ◽  
Yangdong Zhang ◽  
Xuebin Chen ◽  
Lintao Hou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Ternary System ◽  
Band Gap ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Photovoltaic Properties ◽  
Low Band Gap

We successfully developed a ternary system by introducing a low band gap material of DPPEZnP-O into a PTB7 : PC71BM blend to improve the photovoltaic properties of BHJ solar cells.

Dithienopyrrole Based Small Molecule with Low Band Gap for Organic Solar Cells

2015 ◽  
Vol 33 (8) ◽  
pp. 852-858 ◽  
Author(s):  
Miaomiao Li ◽  
Wang Ni ◽  
Huanran Feng ◽  
Bin Kan ◽  
Xiangjian Wan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Low Band Gap

NIR absorbing D–π–A–π–D structured diketopyrrolopyrrole–dithiafulvalene based small molecule for solution processed organic solar cells

2016 ◽  
Vol 52 (1) ◽  
pp. 210-213 ◽  
Author(s):  
K. Narayanaswamy ◽  
A. Venkateswararao ◽  
Vinay Gupta ◽  
Suresh Chand ◽  
Surya Prakash Singh
Keyword(s):  
Molecular Structure ◽  
Solar Cells ◽  
Band Gap ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Solution Processed ◽  
Low Band Gap

A new low band gap small molecule DPP–DTF with a D–π–A–π–D molecular structure composed of a dithiafulvalene (DTF) donor and a diketopyrrolopyrrole (DPP) acceptor was synthesized and tested for organic solar cells.

scholarly journals The Effects of Molecular Packing Behavior of Small-Molecule Acceptors in Ternary Organic Solar Cells

2021 ◽  
Vol 11 (2) ◽  
pp. 755
Author(s):  
Eunhee Lim
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Ternary System ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Orbital Energy ◽  
Working Mechanism ◽  
Energy Level Structure ◽  
The Third ◽  
Molecular Backbone

Herein, two diketopyrrolopyrrole (DPP)-based, small-molecule isomers, o- and p-DPP-PhCN, were introduced as acceptors in ternary organic solar cells (OSCs). The isomers have the same molecular backbone but differ in the positions of the cyanide (CN) substituents (ortho and para), which greatly affects their packing behavior. Ternary solar cells composed of poly(3-hexylthiophene) (P3HT):DPP-PhCN:phenyl-C61-butyric acid methyl ester (PCBM) were fabricated, and the effects of the different packing behaviors of the third component on the device performance and the working mechanism of the ternary cells were investigated. The addition of o-DPP-PhCN with a relatively high-lying lowest unoccupied molecular orbital energy level resulted in an increase in the open-circuit voltage (VOC) in the ternary devices, demonstrating the alloy-like structure of the two acceptors (o-DPP-PhCN and PCBM) in the ternary system. However, the p-DPP-PhCN-based ternary cells exhibited VOC values similar to that of a P3HT:PCBM binary cell, irrespective of the addition of p-DPP-PhCN, indicating a cascade energy-level structure in the ternary system and an effective charge transfer from the P3HT to the PCBM. Importantly, by increasing the addition of p-DPP-PhCN, the short-circuit current density increased substantially, resulting in pronounced shoulder peaks in the external quantum efficiency responses in the long-wavelength region, corresponding to the contribution of the photocurrent generated by the light absorption of p-DPP-PhCN. Despite sharing the same molecular backbone, the two DPP-PhCNs exhibited substantially different packing behaviors according to the position of their CN substituents, which also greatly affected the working mechanism of the ternary devices fabricated using the DPP-PhCNs as the third component.

14.7% all-small-molecule organic solar cells enabled with fullerene derivative incorporation

2021 ◽  
Author(s):  
Hu Dingqin ◽  
Hua Tang ◽  
Haiyan Chen ◽  
Jie Lv ◽  
Shirong Lu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fullerene Derivative ◽  
Photovoltaic Properties

Ternary strategy is promising to enhance the photovoltaic properties of organic solar cells (OSCs). Nevertheless, it is full of challenging when this approach involving only small molecule. Herein, a fullerene...

scholarly journals Design and synthesis of low band gap non-fullerene acceptors for organic solar cells with impressively high Jsc over 21 mA cm_2

2017 ◽  
Vol 60 (9) ◽  
pp. 819-828 ◽  
Author(s):  
Huan-Huan Gao ◽  
Yanna Sun ◽  
Xiangjian Wan ◽  
Bin Kan ◽  
Xin Ke ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Low Band Gap ◽  
Design And Synthesis

Design of low band gap small molecules with alkyldicyanovinyl acceptor and different donor groups for efficient bulk heterojunction organic solar cells

2015 ◽  
Author(s):  
Yuriy N. Luponosov ◽  
Jie Min ◽  
Alexander N. Solodukhin ◽  
Sergei N. Chvalun ◽  
Tayebeh Ameri ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Low Band Gap
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