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...

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.

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.

Non-planar tetrathiafulvalene derivative modified hole transporting layer for efficient organic solar cells with improved fill factor

Solar Energy ◽  
2021 ◽  
Vol 224 ◽  
pp. 883-888
Author(s):  
Min Zhao ◽  
Yuexing Li ◽  
Le Liu ◽  
Chengjie Zhao ◽  
Tonggang Jiu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Hole Transporting ◽  
Tetrathiafulvalene Derivative

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.

Improved charge transport via WSe2-mediated hole transporting layer toward efficient organic solar cells

2018 ◽  
Vol 33 (12) ◽  
pp. 125020
Author(s):  
Donghwan Koo ◽  
Seungon Jung ◽  
Nam Khen Oh ◽  
Yunseong Choi ◽  
Jihyung Seo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Hole Transporting

Active layer thickness effect on the recombination process of PCDTBT:PC71BM organic solar cells

2013 ◽  
Vol 14 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Gon Namkoong ◽  
Jaemin Kong ◽  
Matthew Samson ◽  
In-Wook Hwang ◽  
Kwanghee Lee
Keyword(s):  
Solar Cells ◽  
Layer Thickness ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Recombination Process ◽  
Thickness Effect ◽  
Active Layer Thickness

scholarly journals Effects of Ag Nanocubes with Different Corner Shape on the Absorption Enhancement in Organic Solar Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Feng Shan ◽  
Tong Zhang ◽  
Sheng-Qing Zhu
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Field Enhancement ◽  
Localized Surface Plasmon ◽  
Absorption Enhancement ◽  
Absorption Performance ◽  
Different Shapes ◽  
Ag Ncs ◽  
Metallic Region

The effects of corner shape of silver (Ag) nanocubes (NCs) on optical absorptions of organic solar cells (OSCs) are theoretically investigated by finite element method (FEM) calculations. The absorption of sun light in the active layer is calculated. Significant absorption enhancements have been demonstrated in metallic region with different shapes of Ag NCs, among them corner radius (R) is zero result in the best light absorption performance of up to 55% enhancement with respect to bare OSCs. The origins of increased absorption are believed to be the effects of the huge electric field enhancement and increased scattering upon the excitation of localized surface plasmon resonance (LSPR). Apart from usingR=0, we show thatR=3, 6, and 11.29 of Ag NCs in metallic region of active layer may also result in the maximum comparable absorption enhancement of 49%, 41%, and 28%, respectively. In addition, a significant effect of the period of NCs is observed.

Synthesis of visible-light-absorptive and hole-transporting periodic mesoporous organosilica thin films for organic solar cells

2014 ◽  
Vol 2 (30) ◽  
pp. 11857-11865 ◽  
Author(s):  
Masamichi Ikai ◽  
Yoshifumi Maegawa ◽  
Yasutomo Goto ◽  
Takao Tani ◽  
Shinji Inagaki
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Visible Light ◽  
Organic Solar Cells ◽  
Mesoporous Films ◽  
Periodic Mesoporous Organosilica ◽  
Mesoporous Organosilica ◽  
Type Layer ◽  
Hole Transporting ◽  
P Type

Mesoporous films containing 4,7-dithienyl-2,1,3-benzothiadiazole units in the frameworks were synthesized and demonstrated to function as a p-type layer for organic solar cells by filling an n-type PCBM in the mesopores.

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