scholarly journals Photovoltaics: Quantification of Nano- and Mesoscale Phase Separation and Relation to Donor and Acceptor Quantum Efficiency, J sc , and FF in Polymer:Fullerene Solar Cells (Adv. Mater. 25/2014)

2014 ◽  
Vol 26 (25) ◽  
pp. 4399-4399 ◽  
Author(s):  
Wei Ma ◽  
John R. Tumbleston ◽  
Long Ye ◽  
Cheng Wang ◽  
Jianhui Hou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Quantum Efficiency ◽  
Donor And Acceptor

Quantification of Nano- and Mesoscale Phase Separation and Relation to Donor and Acceptor Quantum Efficiency,Jsc, and FF in Polymer:Fullerene Solar Cells

2014 ◽  
Vol 26 (25) ◽  
pp. 4234-4241 ◽  
Author(s):  
Wei Ma ◽  
John R. Tumbleston ◽  
Long Ye ◽  
Cheng Wang ◽  
Jianhui Hou ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Quantum Efficiency ◽  
Donor And Acceptor

scholarly journals Performance limitations in thieno[3,4-c]pyrrole-4,6-dione-based polymer:ITIC solar cells

2017 ◽  
Vol 19 (35) ◽  
pp. 23990-23998 ◽  
Author(s):  
Fan Yang ◽  
Deping Qian ◽  
Ahmed Hesham Balawi ◽  
Yang Wu ◽  
Wei Ma ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Conjugated Polymers ◽  
Quantum Efficiency ◽  
Bulk Heterojunction ◽  
Large Phase ◽  
Performance Limitations

Three thieno[3,4-c]pyrrole-4,6-dione-based conjugated polymers were applied in non-fullerene solar cells, in which the polymer PTPDBDT provided a high photovoltage but a low quantum efficiency. This was caused by the large phase separation in the bulk-heterojunction as confirmed by systematic studies.

Efficient fullerene-free organic solar cells based on fused-ring oligomer molecules

2016 ◽  
Vol 4 (4) ◽  
pp. 1486-1494 ◽  
Author(s):  
Yuze Lin ◽  
Jiayu Wang ◽  
Tengfei Li ◽  
Yang Wu ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
High Crystallinity ◽  
Donor And Acceptor ◽  
Fused Ring ◽  
Small Phase

Organic solar cells based on monodisperse fused-ring oligomer molecule donor and acceptor blends exhibit a power conversion efficiency of over 6%; high crystallinity and small phase separation coexist in the blends.

Morphology evolution with polymer chain propagation and its impacts on device performance and stability of non-fullerene solar cells

2021 ◽  
Vol 9 (1) ◽  
pp. 556-565
Author(s):  
Long Zhang ◽  
Xuelong Huang ◽  
Chunhui Duan ◽  
Zhongxiang Peng ◽  
Long Ye ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Polymer Chain ◽  
Chain Propagation ◽  
Device Performance ◽  
Morphology Evolution ◽  
Morphological Stability ◽  
Phase Purity ◽  
Donor And Acceptor

Blending morphology evolves with polymer chain propagation with reduced phase separation scale and increased phase purity while blending morphological stability is dominated by the miscibility between the donor and acceptor.

Study Phase Separation of Donor: Acceptor in Inkjet Printed Thin Films of Bulk Heterojunction Organic Solar Cells Using AFM Phase Imaging

2011 ◽  
Vol 364 ◽  
pp. 465-469 ◽  
Author(s):  
Vivi Fauzia ◽  
Akrajas Ali Umar ◽  
Muhamad Mat Salleh ◽  
Muhammad Yahaya
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Phase Separation ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Study Phase ◽  
Phase Imaging ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor

This paper reports an application of Atomic Force Microscopy (AFM) phase imaging to observe the phase separation between electron donor and acceptor materials in bulk heterojunction organic solar cells. The solar cells were fabricated using inkjet printed thin films of blended poly (3-octylthiophene-2,5-diyl)(P3OT) and (6,6)-phenyl C71 butyric acid methyl ester (PC71BM) as donor and acceptor materials respectively. The content PC71BM in the blended was varying from 25, 50 and 75 wt %. The AFM phase images of the thin film which contains 25 wt % PC71BM indicated that the acceptor molecules, PC71BM, are well distributed in the polymer chain of donor material, P3OT. The solar cell contains this film has the highest generated photocurrent. Hence, the phase separation between electron donor and acceptor materials in bulk heterojunction organic solar cells is one essential aspect that influences generation of photocurrent.

Microcrystalline (Si,Ge):H Solar Cells

2003 ◽  
Vol 762 ◽  
Author(s):  
Jianhua Zhu ◽  
Vikram L. Dalal
Keyword(s):  
Solar Cells ◽  
Buffer Layer ◽  
Quantum Efficiency ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Defect Density ◽  
Cell Structure ◽  
Open Circuit ◽  
Base Layer ◽  
Ecr Plasma

AbstractWe report on the growth and properties of microcrystalline Si:H and (Si,Ge):H solar cells on stainless steel substrates. The solar cells were grown using a remote, low pressure ECR plasma system. In order to crystallize (Si,Ge), much higher hydrogen dilution (∼40:1) had to be used compared to the case for mc-Si:H, where a dilution of 10:1 was adequate for crystallization. The solar cell structure was of the p+nn+ type, with light entering the p+ layer. It was found that it was advantageous to use a thin a-Si:H buffer layer at the back of the cells in order to reduce shunt density and improve the performance of the cells. A graded gap buffer layer was used at the p+n interface so as to improve the open-circuit voltage and fill factor. The open circuit voltage and fill factor decreased as the Ge content increased. Quantum efficiency measurements indicated that the device was indeed microcrystalline and followed the absorption characteristics of crystalline ( Si,Ge). As the Ge content increased, quantum efficiency in the infrared increased. X-ray measurements of films indicated grain sizes of ∼ 10nm. EDAX measurements were used to measure the Ge content in the films and devices. Capacitance measurements at low frequencies ( ~100 Hz and 1 kHz) indicated that the base layer was indeed behaving as a crystalline material, with classical C(V) curves. The defect density varied between 1x1016 to 2x1017/cm3, with higher defects indicated as the Ge concentration increased.

scholarly journals Design and characterization of effective solar cells

2021 ◽  
Author(s):  
Varun Ojha ◽  
Giorgio Jansen ◽  
Andrea Patanè ◽  
Antonino La Magna ◽  
Vittorio Romano ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Efficiency ◽  
Cost Benefit Analysis ◽  
Cost Minimization ◽  
Cell Structure ◽  
Cost Benefit ◽  
Structure Design ◽  
Multi Objective Optimization ◽  
Nsga Ii ◽  
Multi Objective

AbstractWe propose a two-stage multi-objective optimization framework for full scheme solar cell structure design and characterization, cost minimization and quantum efficiency maximization. We evaluated structures of 15 different cell designs simulated by varying material types and photodiode doping strategies. At first, non-dominated sorting genetic algorithm II (NSGA-II) produced Pareto-optimal-solutions sets for respective cell designs. Then, on investigating quantum efficiencies of all cell designs produced by NSGA-II, we applied a new multi-objective optimization algorithm II (OptIA-II) to discover the Pareto fronts of select (three) best cell designs. Our designed OptIA-II algorithm improved the quantum efficiencies of all select cell designs and reduced their fabrication costs. We observed that the cell design comprising an optimally doped zinc-oxide-based transparent conductive oxide (TCO) layer and rough silver back reflector (BR) offered a quantum efficiency ($$Q_e$$ Q e ) of 0.6031. Overall, this paper provides a full characterization of cell structure designs. It derives relationship between quantum efficiency, $$Q_e$$ Q e of a cell with its TCO layer’s doping methods and TCO and BR layer’s material types. Our solar cells design characterization enables us to perform a cost-benefit analysis of solar cells usage in real-world applications.

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)....

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