Composition-dependent phase separation effects of organic solar cells using P3HT:PCBM as active layer and chromium oxide as hole transporting layer

2011 ◽  
Vol 257 (9) ◽  
pp. 3952-3958 ◽  
Author(s):  
Pingli Qin ◽  
Guojia Fang ◽  
Nanhai Sun ◽  
Xi Fan ◽  
Qiao Zheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Chromium Oxide ◽  
Organic Solar Cells ◽  
Hole Transporting

Achieving Efficient Organic Solar Cells via Synergistically Doping Active Layer and Interface by A Conjugated Macrocycle

2021 ◽  
Author(s):  
Yan Wang ◽  
Yi Zhang ◽  
Tong Shan ◽  
Qingyun Wei ◽  
Zhenchuang Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Device Optimization ◽  
Hole Transporting

To facilitate the device optimization of organic solar cells, a conjugated macrocycle namely cyanostar is firstly utilized to simultaneously modify the active layer and hole transporting layer. Benefiting from the...

Vertically Optimized Phase Separation with Improved Exciton Diffusion Enables High-Efficiency Organic Solar Cells with Thick Active Layers

2021 ◽  
Author(s):  
Yanming Sun ◽  
Yunhao Cai ◽  
Qian Li ◽  
Guanyu Lu ◽  
Hwa Sook Ryu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Diffusion Length ◽  
Active Layer Thickness ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Active Layers

Abstract The development of high-performance organic solar cells (OSCs) with thick active layers is of crucial importance for the roll-to-roll printing of large-area solar panels. Unfortunately, increasing the active layer thickness usually results in a significant reduction in efficiency. Herein, we fabricated efficient thick-film OSCs with an active layer consisting of one polymer donor and two non-fullerene acceptors. The two acceptors were found to possess enlarged exciton diffusion length in the mixed phase, which is beneficial to exciton generation and dissociation. Additionally, layer by layer approach was employed to optimize the vertical phase separation. Benefiting from the synergetic effects of enlarged exciton diffusion length and graded vertical phase separation, a record high efficiency of 17.31% (certified value of 16.9%) was obtained for the 300 nm-thick OSC, with an unprecedented short-circuit current density of 28.36 mA cm−2, and a high fill factor of 73.0%. Moreover, the device with an active layer thickness of 500 nm also shows a record efficiency of 15.21%. This work provides new insights into the fabrication of high-efficiency OSCs with thick active layers.

Tuning the morphology of the active layer of organic solar cells by spin 1/2 radicals

2019 ◽  
Vol 43 (35) ◽  
pp. 13998-14008
Author(s):  
Yuancheng Qin ◽  
Manman Li ◽  
Yu Xie ◽  
Xue Li ◽  
Chunming Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Network Structure ◽  
Organic Solar Cells ◽  
Interpenetrating Network ◽  
Donor Acceptor

The morphology of the active layer, the formation of an interpenetrating network structure and the phase separation of donor–acceptor polymers has been improved by spin 1/2 radicals, and enhanced the PCEs of the organic solar cells.

Molecular Ordering and Phase Segregation Induced by a Volatile Solid Additive for Highly Efficient All-Small-Molecular Organic Solar Cells

2020 ◽  
Author(s):  
Shanshan Chen ◽  
Junfeng Ye ◽  
Qianguang Yang ◽  
Jiyeon Oh ◽  
Dingqin Hu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Phase Segregation ◽  
Morphology Control ◽  
Volatile Solid ◽  
Trade Off ◽  
Molecular Ordering ◽  
Solid Additive

Morphology control remains a major challenge for all-small-molecular organic solar cells (ASM OSCs), mainly reflecting in the elusive trade-off between the molecular ordering and phase separation of the active layer....

scholarly journals Enhanced charge carrier transport in spray-cast organic solar cells using solution processed MoO3 micro arrays

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3059-3065 ◽  
Author(s):  
Ran Ji ◽  
Jiang Cheng ◽  
Xin Yang ◽  
Junsheng Yu ◽  
Lu Li
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Molybdenum Oxide ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Carrier Transport ◽  
Charge Carrier Transport ◽  
Solution Processed ◽  
Hole Transporting ◽  
Micro Array

A toward all spray fabrication routine was used to fabricate organic solar cells (OSCs), in which a molybdenum oxide (MoO3) micro array was deposited on the active layer. The influence of the hole transporting property on the OSC performance was studied.

Nanoscale Phase Separation in Ternary Organic Solar Cells Based on PTB7:PC70BM:IC70BA

2021 ◽  
Vol 21 (11) ◽  
pp. 5749-5755
Author(s):  
Chang Li ◽  
Wei Li ◽  
Xiaoxiang Sun ◽  
Jifei Wang ◽  
Jiayou Tao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Weight Ratio ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Hole Transport ◽  
Fullerene Derivative

As a fullerene derivative, IC70BA is widely used in the ternary organic solar cells (TOSCs) to increase the open circuit voltage (Voc) of the devices. Unfortunately, most of the literature shows that IC70BA will lead to a reduction in the short-circuit current density (Jsc) and fill factor (FF). In this work, IC70BA is added to the PTB7:PC70BM binary system to form the ternary system, which is composed of one donor and two fullerene acceptors. Surprisingly, the addition of IC70BA does not immediately lead to a decrease in Jsc and FF. In fact, the appropriate weight ratio of IC70BA in fullerenes can simultaneously increase the Voc, Jsc, and FF of the TOSCs. The synergistic optimization of the surface and bulk morphology of the ternary active layer suppresses the attenuation of Jsc and FF. The smooth surface and suitable phase separation size effectively guarantee the separation, transport and extraction of the charge. Moreover, the addition of IC70BA can significantly improve the hole transport capacity of the active layer, and the optimal hole mobility is 5.13 – 10”4 cm2V–1S–1. Finally, the TOSCs with 10% weight ratio of IC70BA gives the optimal PCE of 9.24% and ideality factor of 2.3.

Organic solar cells with p-type amorphous chromium oxide thin film as hole-transporting layer

2011 ◽  
Vol 519 (13) ◽  
pp. 4334-4341 ◽  
Author(s):  
Pingli Qin ◽  
Guojia Fang ◽  
Nanhai Sun ◽  
Xi Fan ◽  
Qiao Zheng ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Chromium Oxide ◽  
Organic Solar Cells ◽  
Oxide Thin Film ◽  
Hole Transporting ◽  
P Type

Solution-Processed Silver Electrode for Inverted Organic Solar Cell Based on Easily Deposited Hole Transporting Layer onto Hydrophobic Active Layer

2020 ◽  
Vol 29 ◽  
pp. 37-50
Author(s):  
Yasser A.M. Ismail ◽  
Essam Ramadan Shaaban ◽  
Ahmed Ali Showahy ◽  
Sayed Mahmoud ◽  
Abdelrahman A.M. Ismail
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Room Temperature ◽  
Solution Processed ◽  
Silver Paste ◽  
Ag Electrode ◽  
Roll To Roll ◽  
Hole Transporting

For reducing the production costs, decreasing the fabrication time and for practical applications used in roll-to-roll process for inverted organic solar cells (IOSCs), silver (Ag) back-electrode have been deposited from silver paste solution at room temperature using simple, cheap and easy manual spray method, with completely avoiding the use of thermal evaporation system for solar cell preparation. In addition, a layer of poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) as a hole transporting layer have been deposited from an aqueous solution onto hydrophobic active layer without any chemical additives or additional treatments. For optimizing the Ag film, to be used as a back electrode in the IOSCs, series resistance of the indium tin oxide (ITO)/PEDOT:PSS/Ag device was measured at different compositions of silver paste dispersed in ethanol, different annealing temperatures and different silver paste amounts sprayed onto PEDOT:PSS layer. The dilution process of silver paste with ethanol is practical to reduce its commercial cost and to decrease its viscosity to be easily sprayed using spray gun for application in large scale production with avoiding solidification and fast curing at room temperature. Using the present method, the Ag electrode has been efficiently sprayed on the top of organic solar cells with low electrical resistance, large thickness and good hardness against crashes. We found that, the high thickness of both PEDOT:PSS layer and Ag electrode deposited on the top of solar cell active layer prevent and suppress oxygen penetration towards P3HT:PCBM active layer. Therefore, the optimized solar cell revealed good air stability, compared to their counterparts in other literatures, under ambient atmosphere with approximately 86% retention of their original conversion efficiency after 154 days. Our results indicate that the solution-processed Ag back-electrode using easy method has a potential to be used in roll-to-roll processed organic solar cells and other optoelectronic applications.

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