Highly efficient hybrid solar cells with tunable dipole at the donor–acceptor interface

Nanoscale ◽  
2014 ◽  
Vol 6 (18) ◽  
pp. 10545-10550 ◽  
Author(s):  
Weifei Fu ◽  
Ling Wang ◽  
Jun Ling ◽  
Hanying Li ◽  
Minmin Shi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Hybrid Solar Cells ◽  
Exciton Dissociation ◽  
Dissociation Process ◽  
Molecular Dipole ◽  
Highly Efficient ◽  
Donor Acceptor

Effects of molecular dipole at the polymer–nanocrystal interface on the energy level alignment, the exciton dissociation process, and consequently the photovoltaic performance of bulk heterojunction hybrid solar cells are systemically studied.

scholarly journals All-small-molecule organic solar cells with over 14% efficiency by optimizing hierarchical morphologies

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ruimin Zhou ◽  
Zhaoyan Jiang ◽  
Chen Yang ◽  
Jianwei Yu ◽  
Jirui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Photovoltaic System ◽  
Active Layers ◽  
Donor Acceptor

AbstractThe high efficiency all-small-molecule organic solar cells (OSCs) normally require optimized morphology in their bulk heterojunction active layers. Herein, a small-molecule donor is designed and synthesized, and single-crystal structural analyses reveal its explicit molecular planarity and compact intermolecular packing. A promising narrow bandgap small-molecule with absorption edge of more than 930 nm along with our home-designed small molecule is selected as electron acceptors. To the best of our knowledge, the binary all-small-molecule OSCs achieve the highest efficiency of 14.34% by optimizing their hierarchical morphologies, in which the donor or acceptor rich domains with size up to ca. 70 nm, and the donor crystals of tens of nanometers, together with the donor-acceptor blending, are proved coexisting in the hierarchical large domain. All-small-molecule photovoltaic system shows its promising for high performance OSCs, and our study is likely to lead to insights in relations between bulk heterojunction structure and photovoltaic performance.

Photovoltaic performance of P3HT-porphyrin functionalized 1D CdS nanostructured organic inorganic bulk heterojunction hybrid solar cells

2017 ◽  
Vol 78 (3) ◽  
pp. 34809 ◽  
Author(s):  
Uzma Jabeen ◽  
Tham Adhikari ◽  
Syed Mujtaba Shah ◽  
Dinesh Pathak ◽  
Tomas Wagner ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Hybrid Solar Cells

Integration of Multiwalled Carbon Nanotubes in Bulk Heterojunction CdSe/PCPDTBT Hybrid Solar Cells

2018 ◽  
Vol 929 ◽  
pp. 150-157
Author(s):  
Alfian Ferdiansyah Madsuha ◽  
Nofrijon Sofyan ◽  
Akhmad Herman Yuwono ◽  
Michael Krueger
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Multiwalled Carbon Nanotubes ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Hybrid Solar Cells ◽  
Cdse Qds ◽  
Multiwalled Carbon ◽  
Simple Method

In this work, the development of solution-processed bulk heterojunction hybrid solar cells based on CdSe quantum dot (QD) and conjugated polymer poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)], PCPDTBT was performed. The photoactive layer was formed by integrating CdSe QDs onto multiwalled carbon nanotubes (CNTs). A simple method of thiol functionalization in the interface CNTs and CdSe QDs has been investigated. Integration of CNTs enhances long-term performance of solar cells devices. Initial PCE values of about 1.9 % under AM1.5G illumination have been achieved for this hybrid CNT-CdSe photovoltaic device. In addition, the long-term stability of the photovoltaic performance of the devices was investigated and found superior to CdSe QD only based devices. About 84 % of the initial PCE remained after storage in a glove box for one year without any further encapsulation. It is concluded that the improvement is mainly due to a strong binding between thiol functionalized CNTs and CdSe QDs, resulting preservation of the nanomorphology of the hybrid film over time.

scholarly journals Electronic interactions of silicon nanocrystals and nanocarbon materials: Hybrid solar cells

2012 ◽  
Vol 84 (12) ◽  
pp. 2629-2639 ◽  
Author(s):  
Vladimir Švrček ◽  
Davide Mariotti
Keyword(s):  
Solar Cells ◽  
Energy Conversion ◽  
Silicon Nanocrystals ◽  
Large Scale ◽  
Energy Gap ◽  
Bulk Heterojunction ◽  
Hybrid Solar Cells ◽  
Exciton Dissociation ◽  
Electronic Interactions ◽  
Nanocarbon Materials

Hybrid inorganic/nanocarbon solar cells represent low-cost solutions for the large-scale manufacturing of energy conversion devices. Here we discuss results that relate to the electronic interactions of nanocarbon materials with freestanding and surfactant-free silicon nanocrystals (Si-ncs) with quantum confinement effects, integrated in bulk-heterojunction solar cells. In particular, we demonstrate the feasibility of bulk-heterojunction photovoltaic solar cells that consist of Si-ncs combined with fullerenes or with semiconducting single-walled carbon nanotubes (SWCNTs). We show that the energy levels between Si-ncs with energy gap exceeding 1.75 eV and fullerenes are adequate for exciton dissociation and carriers (electrons/holes) generation and that hybrid solar cells formed by Si-ncs and semi-conducting SWCNTs favor exciton dissociation only when a distinct chiral index [i.e., (7,5)] is used. While fullerenes show energy conversion capabilities in the visible spectral region (1.7–3.1 eV), the cells containing the SWCNTs, in comparison, have a considerably expanded optical response covering a broad range of the spectrum (0.9–3.1 eV).

scholarly journals Improved photovoltaic performance of triple-cation mixed-halide perovskite solar cells with binary trivalent metals incorporated into the titanium dioxide electron transport layer

2019 ◽  
Vol 7 (17) ◽  
pp. 5028-5036 ◽  
Author(s):  
M. Thambidurai ◽  
Shini Foo ◽  
K. M. Muhammed Salim ◽  
P. C. Harikesh ◽  
Annalisa Bruno ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Electron Transport ◽  
Energy Level ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Highly Efficient ◽  
Halide Perovskite

Simultaneous improvement in transparency, conductivity, and energy level alignment was attained via a highly efficient AlIn-TiO2 ETL with the unrivaled PCE of 19%.

scholarly journals Instantaneous charge separation in non-fullerene acceptor bulk-heterojunction of highly efficient solar cells

2019 ◽  
Vol 205 ◽  
pp. 05010
Author(s):  
V. A. Camargo Franco ◽  
Nicola Gasparini ◽  
Tetsuhiko Nagahara ◽  
Larry Lüer ◽  
Giulio Cerullo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Separation ◽  
High Efficiency ◽  
Transient Absorption ◽  
Bulk Heterojunction ◽  
Acceptor Level ◽  
Highly Efficient ◽  
Donor Acceptor

Using broadband transient absorption in a high efficiency (>11%) photovoltaic blend with a non-fullerene acceptor, we observe instantaneous (sub-30 fs) charge separation, demonstrating close to ideal donor-acceptor level matching and nanomorphology in this blend.

scholarly journals Branched Electron-Donor Core Effect in D-π-A Star-Shaped Small Molecules on Their Properties and Performance in Single-Component and Bulk-Heterojunction Organic Solar Cells

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3596
Author(s):  
Alexander N. Solodukhin ◽  
Yuriy N. Luponosov ◽  
Artur L. Mannanov ◽  
Petr S. Savchenko ◽  
Artem V. Bakirov ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Charge Carrier Mobility ◽  
Single Component ◽  
Orbital Energy ◽  
Donor Acceptor ◽  
And Performance ◽  
Acceptor Molecules

Star-shaped donor-acceptor molecules are full of promise for organic photovoltaics and electronics. However, the effect of the branching core on physicochemical properties, charge transport and photovoltaic performance of such donor-acceptor materials in single-component (SC) and bulk heterojunction (BHJ) organic solar cells has not been thoroughly addressed. This work shows the comprehensive investigation of six star-shaped donor-acceptor molecules with terminal hexyldicyanovinyl blocks linked through 2,2′-bithiophene π-conjugated bridge to different electron-donating cores such as the pristine and fused triphenylamine, tris(2-methoxyphenyl)amine, carbazole- and benzotriindole-based units. Variation of the branching core strongly impacts on such important properties as the solubility, highest occupied molecular orbital energy, optical absorption, phase behavior, molecular packing and also on the charge-carrier mobility. The performance of SC or BHJ organic solar cells are comprehensively studied and compared. The results obtained provide insight on how to predict and fine-tune photovoltaic performance as well as properties of donor-acceptor star-shaped molecules for organic solar cells.

Self-assembled bulk heterojunctions from integral molecules with nonconjugately linked donor and acceptor units for photovoltaic applications

2020 ◽  
Vol 4 (7) ◽  
pp. 3190-3210
Author(s):  
Hao Liu ◽  
Huaizhi Gao ◽  
Jun Lin ◽  
Tasawar Hayat ◽  
Ahmed Alsaedi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Polymer Solar Cells ◽  
Bulk Heterojunctions ◽  
Heterojunction Structure ◽  
Highly Efficient ◽  
Donor And Acceptor ◽  
Photovoltaic Applications ◽  
Donor Acceptor ◽  
Self Assembled

Donor–acceptor integral molecules with donor and acceptor units interlinked by nonconjugated flexible linking units can self-assemble into an ideal bulk heterojunction structure for application in highly efficient polymer solar cells are reviewed.

Hybrid Solar Cells Based on CdS Nanowire Arrays

2013 ◽  
Vol 854 ◽  
pp. 75-82 ◽  
Author(s):  
D.O. Grynko ◽  
O.M. Fedoryak ◽  
P.S. Smertenko ◽  
N.A. Ogurtsov ◽  
A.A. Pud ◽  
...  
Keyword(s):  
Solar Cells ◽  
Bulk Heterojunction ◽  
Electron Flow ◽  
Nanowire Array ◽  
Active Role ◽  
High Electron ◽  
Hybrid Solar Cells ◽  
Cds Nanowire ◽  
Donor Acceptor

Three types of hybrid solar cells based on CdS nanowire crystals have been prepared, i.e., (i) nanocrystal - polymer, (ii) nanocrystal - dye and (iii) nanocrystal - organic donor-acceptor bulk heterojunction (BHJ), and the role of CdS layer in each of the above structures has been elucidated. It has been found that CdS plays the active role of acceptor in the first two types of solar cells, whereas it plays the role of an electron-transporting (hole-blocking) layer to rectify electron flow from the organic donor-acceptor BHJ to anode in the case (iii). By changing morphology of the CdS layer from a textured continuous film to a nanowire array we demonstrate an improved efficiency of collection of charge carriers due to the increased organic-CdS interface area. Overall, a bifunctional role of the CdS nanostructured layer as a bottom electrode with a high electron affinity and as a means to increase a hybrid interface for better electron collection from the organic active layer has been demonstrated.

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