Chemical Analysis of the Interface in Bulk-Heterojunction Solar Cells by X-ray Photoelectron Spectroscopy Depth Profiling

2017 ◽  
Vol 9 (4) ◽  
pp. 3842-3848 ◽  
Author(s):  
Yan Busby ◽  
Emil J. W. List-Kratochvil ◽  
Jean-Jacques Pireaux
Keyword(s):  
Solar Cells ◽  
Chemical Analysis ◽  
Photoelectron Spectroscopy ◽  
Bulk Heterojunction ◽  
Depth Profiling ◽  
X Ray ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

Comparative Charge Transport Study of MEHPPV–TiO2 and P3HT–TiO2 Nanocomposites for Hybrid Bulk Heterojunction Solar Cells

2019 ◽  
Vol 19 (6) ◽  
pp. 3408-3419 ◽  
Author(s):  
Sumit Kumar ◽  
Shailesh Narian Sharma ◽  
Jitendra Kumar
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Photoelectron Spectroscopy ◽  
Bulk Heterojunction ◽  
Photovoltaic Device ◽  
Superior Performance ◽  
Diffraction Field ◽  
X Ray ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

TiO2 nanorods integrated with poly[2-methoxy,5-(2-ethylhexyloxy)-p-phenylenevinylene] (MEHPPV) and poly(3-hexylthiophene) (P3HT) matrixes were investigated for charge transport properties to evaluate their potential application in a hybrid solar cell device. An exhaustive characterization was performed to identify the best hybrid nanocomposite among MEHPPV–TiO2 and P3HT–TiO2. The analysis involved optical and electrical characterization techniques such as the X-ray diffraction, field emission scanning electron microscope, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, photoluminescence, atomic force microscopy, X-ray photoelectron spectroscopy, and I–V measurements. TiO2 nanorods exhibited excellent dispersion in both polymer matrixes, thus significantly improving the photocurrent generation and net efficiency. Therefore, the overall device performance was improved. The findings of this study demonstrated that the P3HT–TiO2 photovoltaic device exhibited superior performance than the MEHPPV–TiO2 photovoltaic device. We believe that this evaluation would certainly contribute to the understanding of interfacial exciton dissociation in nanoscale morphology for the next-generation hybrid bulk heterojunction solar cells.

scholarly journals Graded bulk-heterojunction enables 17% binary organic solar cells via nonhalogenated open air coating

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ying Zhang ◽  
Kuan Liu ◽  
Jiaming Huang ◽  
Xinxin Xia ◽  
Jiupeng Cao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Organic Solar Cells ◽  
Photoelectron Spectroscopy ◽  
Bulk Heterojunction ◽  
Depth Profiling ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrd Techniques

AbstractGraded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated G-BHJ OSCs deliver an outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence X-ray diffraction (GI-XRD) techniques enable the visualization of polymer/NFA composition and crystallinity gradient distributions, which benefit charge transport, and enable outstanding thick OSC PCEs (16.25% for 300 nm, 14.37% for 500 nm), which are among the highest reported. Moreover, the nonhalogenated solvent enabled G-BHJ OSC via open-air blade coating and achieved a record 16.77% PCE. The blade-coated G-BHJ has drastically different D-A crystallization kinetics, which suppresses the excessive aggregation induced unfavorable phase separation in BHJ. All these make G-BHJ a feasible and promising strategy towards highly efficient, eco- and manufacture friendly OSCs.

Effects of 1,8-diiodooctane on domain nanostructure and charge separation dynamics in PC71BM-based bulk heterojunction solar cells

2018 ◽  
Vol 6 (46) ◽  
pp. 23805-23818 ◽  
Author(s):  
Sylvia J. Lou ◽  
Nanjia Zhou ◽  
Xugang Guo ◽  
Robert P. H. Chang ◽  
Tobin J. Marks ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Separation ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Charge Generation ◽  
X Ray ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells ◽  
X Ray Scattering ◽  
Ray Scattering

Transient absorption and X-ray scattering demonstrate 1,8-diiodooctane impact on morphology and charge generation in mixed phases in bulk heterojunction solar cells.

Non-geminate Recombination Limits Fill Factor in Polymer:ITIC Bulk Heterojunction Solar Cells

2019 ◽  
Author(s):  
Jafar Khan ◽  
Yuliar Firdaus ◽  
Federico Cruciani ◽  
Shengjian Liu ◽  
Denis Andrienko ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Bulk Heterojunction ◽  
Geminate Recombination ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

Soluble porphyrin donors for small molecule bulk heterojunction solar cells

2012 ◽  
Vol 22 (36) ◽  
pp. 19258 ◽  
Author(s):  
Junichi Hatano ◽  
Naoki Obata ◽  
Shigeru Yamaguchi ◽  
Takeshi Yasuda ◽  
Yutaka Matsuo
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Bulk Heterojunction ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells
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