Improvement of Interfacial Contacts for New Small-Molecule Bulk-Heterojunction Organic Photovoltaics

2012 ◽  
Vol 24 (39) ◽  
pp. 5368-5373 ◽  
Author(s):  
Andres Garcia ◽  
Gregory C. Welch ◽  
Erin L. Ratcliff ◽  
David S. Ginley ◽  
Guillermo C. Bazan ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction

scholarly journals Melt-processing of small molecule organic photovoltaics via bulk heterojunction compatibilization

2018 ◽  
Vol 20 (10) ◽  
pp. 2218-2224 ◽  
Author(s):  
Aiman Rahmanudin ◽  
Liang Yao ◽  
Xavier A. Jeanbourquin ◽  
Yongpeng Liu ◽  
Arvindh Sekar ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction ◽  
Melt Processing ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

A specially-designed molecular compatibilizer enables bulk-heterojunction organic photovoltaic devices that tolerate melt processing thus reducing the need for toxic solvents.

scholarly journals Improving the Photostability of Small-Molecule-Based Organic Photovoltaics by Providing a Charge Percolation Pathway of Crystalline Conjugated Polymer

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2598
Author(s):  
Jihee Kim ◽  
Chang Woo Koh ◽  
Mohammad Afsar Uddin ◽  
Ka Yeon Ryu ◽  
Song-Rim Jang ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Conjugated Polymer ◽  
Bulk Heterojunction ◽  
Hole Mobility ◽  
Chemical Structures ◽  
Active Layers ◽  
Similar Chemical ◽  
A Charge ◽  
Soaking Test

Photostability of small-molecule (SM)-based organic photovoltaics (SM-OPVs) is greatly improved by utilizing a ternary photo-active layer incorporating a small amount of a conjugated polymer (CP). Semi-crystalline poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2FBT) and amorphous poly[(2,5-bis(2-decyltetradecyloxy)phenylene)-alt-(5,6-dicyano-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2CNBT) with similar chemical structures were used for preparing SM:fullerene:CP ternary photo-active layers. The power conversion efficiency (PCE) of the ternary device with PPDT2FBT (Ternary-F) was higher than those of the ternary device with PPDT2CNBT (Ternary-CN) and a binary SM-OPV device (Binary) by 15% and 17%, respectively. The photostability of the SM-OPV was considerably improved by the addition of the crystalline CP, PPDT2FBT. Ternary-F retained 76% of its initial PCE after 1500 h of light soaking, whereas Ternary-CN and Binary retained only 38% and 17% of their initial PCEs, respectively. The electrical and morphological analyses of the SM-OPV devices revealed that the addition of the semi-crystalline CP led to the formation of percolation pathways for charge transport without disturbing the optimized bulk heterojunction morphology. The CP also suppressed trap-assisted recombination and enhanced the hole mobility in Ternary-F. The percolation pathways enabled the hole mobility of Ternary-F to remain constant during the light-soaking test. The photostability of Ternary-CN did not improve because the addition of the amorphous CP inhibited the formation of ordered SM domains.

Insulating polymer additives in small molecule and polymer photovoltaics: how they are tolerated and their use as potential interlayers

2017 ◽  
Vol 5 (13) ◽  
pp. 3315-3322 ◽  
Author(s):  
Joseph G. Manion ◽  
Dong Gao ◽  
Peter M. Brodersen ◽  
Dwight S. Seferos
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction ◽  
Polymer Additives ◽  
Polymer Photovoltaics ◽  
Efficient Performance

Additives are key to achieving optimal morphologies and efficient performance in bulk heterojunction organic photovoltaics.

Small molecule BODIPY dyes as non-fullerene acceptors in bulk heterojunction organic photovoltaics

2014 ◽  
Vol 50 (22) ◽  
pp. 2913-2915 ◽  
Author(s):  
Ambata M. Poe ◽  
Andrea M. Della Pelle ◽  
Ayyagari V. Subrahmanyam ◽  
William White ◽  
Guillaume Wantz ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Bulk Heterojunction ◽  
Electron Acceptors

A–D–A small-molecule electron acceptors containing meso-conjugated BODIPY caps were employed in P3HT-based OPV devices, yielding efficiencies as high as 1.51%.

A privileged ternary blend enabling non-fullerene organic photovoltaics with over 14% efficiency

2020 ◽  
Vol 8 (43) ◽  
pp. 15135-15141
Author(s):  
Jing Yan ◽  
Yuan-Qiu-Qiang Yi ◽  
Jianqi Zhang ◽  
Huanran Feng ◽  
Yanfeng Ma ◽  
...  
Keyword(s):  
Small Molecule ◽  
Organic Photovoltaics ◽  
Power Conversion ◽  
Ternary Blend ◽  
Conversion Efficiencies

Two non-fullerene small molecule acceptors, NT-4F and NT-4Cl, were designed and synthesized. Power conversion efficiencies of 11.44% and 14.55% were achieved for NT-4Cl-based binary and ternary devices, respectively.

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