Manipulate Micrometer Surface and Nanometer Bulk Phase Separation Structures in the Active Layer of Organic Solar Cells via Synergy of Ultrasonic and High-Pressure Gas Spraying

2019 ◽  
Vol 11 (11) ◽  
pp. 10777-10784 ◽  
Author(s):  
Alei Liu ◽  
Wenhao Zheng ◽  
Xiaolong Yin ◽  
Junyu Yang ◽  
Yuanbao Lin ◽  
...  
Keyword(s):  
High Pressure ◽  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Bulk Phase

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....

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.

scholarly journals Restricting the liquid–liquid phase separation of PTB7-Th:PF12TBT:PC71BM by enhanced PTB7-Th solution aggregation to optimize the interpenetrating network

RSC Advances ◽  
2017 ◽  
Vol 7 (29) ◽  
pp. 17913-17922 ◽  
Author(s):  
Bin Tang ◽  
Jiangang Liu ◽  
Xinxiu Cao ◽  
Qiaoqiao Zhao ◽  
Xinhong Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Liquid Phase ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Liquid Phase Separation ◽  
Current Understanding ◽  
Interpenetrating Network ◽  
Solution Aggregation ◽  
Liquid Liquid Phase Separation

The current understanding of the active layer morphology in ternary organic solar cells (OSCs) is superficial owing to more variables and complexity compared to that of binary OSCs.

Rational compatibility in ternary matrix enables all-small-molecule organic solar cells with over 16% efficiency

2021 ◽  
Author(s):  
Mengyun Jiang ◽  
Hairui Bai ◽  
Hongfu Zhi ◽  
Lu Yan ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Charge Generation ◽  
Molecular Arrangement ◽  
Efficient Charge

How to manipulate the phase separation and molecular arrangement to meet the need of efficient charge generation and extraction remains as the long-standing challenge in all-small-molecule organic solar cells (ASM-OSCs)....

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...

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.

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