scholarly journals Interfacial Energetic Level Mapping and Nano-Ordering of Small Molecule/Fullerene Organic Solar Cells by Scanning Tunneling Microscopy and Spectroscopy

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 427 ◽  
Author(s):  
Irving Caballero-Quintana ◽  
Daniel Romero-Borja ◽  
José-Luis Maldonado ◽  
Juan Nicasio-Collazo ◽  
Olivia Amargós-Reyes ◽  
...  
Keyword(s):  
Solar Cells ◽  
Scanning Tunneling Microscopy ◽  
Thermal Annealing ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Solvent Vapor ◽  
Energetic Level

Using scanning tunneling microscopy (STM) and spectroscopy (STS) at the liquid/solid interface, morphology evolution process and energetic level alignment of very thin solid films (thickness: <700 pm), of the low molecular weight molecule DRCN5T and DRCN5T:[70]PCBM blend are analyzed after applying thermal annealing at different temperatures. These films exhibit a worm-like pattern without thermal annealing (amorphous shape); however, after applying thermal annealing at 120 °C, the small molecule film domains crystallize verified by X-ray diffraction: structural geometry becomes a well-defined organized array. By using STS, the energy band diagrams of the semiconductor bulk heterojunction (blended film) at the donor-acceptor interface are determined; morphology and energy characteristics can be correlated with the organic solar cells (OSC) performance. When combining thermal treatment and solvent vapor annealing processes as described in previous literature by using other techniques, OSC devices based on DRCN5T show a very acceptable power conversion efficiency of 9.0%.

Semiconducting Polymer Thin Films Used in Organic Solar Cells: A Scanning Tunneling Microscopy Study

2018 ◽  
pp. 1800499 ◽  
Author(s):  
Irving Caballero‐Quintana ◽  
José‐Luis Maldonado ◽  
Marco‐Antonio Meneses‐Nava ◽  
Oracio Barbosa‐García ◽  
José Valenzuela‐Benavides ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Scanning Tunneling Microscopy ◽  
Organic Solar Cells ◽  
Polymer Thin Films ◽  
Microscopy Study ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Semiconducting Polymer ◽  
Scanning Tunneling Microscopy Study

Phenothiazine-based small-molecule organic solar cells with power conversion efficiency over 7% and open circuit voltage of about 1.0 V using solvent vapor annealing

2018 ◽  
Vol 20 (9) ◽  
pp. 6321-6329 ◽  
Author(s):  
Yogajivan Rout ◽  
Rajneesh Misra ◽  
Rahul Singhal ◽  
Subhayan Biswas ◽  
Ganesh D. Sharma
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Open Circuit ◽  
Solvent Vapor ◽  
Heterojunction Solar Cells ◽  
Vapor Annealing ◽  
Solvent Vapor Annealing

We have used two unsymmetrical small molecules with a D–A–D–π–D configuration as small molecule donors, along with PC71BM as an acceptor, for solution processed bulk heterojunction solar cells.

Effect of thermal annealing on active layer morphology and performance for small molecule bulk heterojunction organic solar cells

2014 ◽  
Vol 2 (35) ◽  
pp. 7247-7255 ◽  
Author(s):  
Zuo Yi ◽  
Wang Ni ◽  
Qian Zhang ◽  
Miaomiao Li ◽  
Bin Kan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Thermal Annealing ◽  
Active Layer ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells ◽  
And Performance ◽  
The Impact

Bulk heterojunction solar cells based on a novel small molecule (DRDTSBDTT) were systematically investigated to understand the impact of thermal annealing on Voc, Jsc and FF.

Furan-bridged thiazolo [5,4-d]thiazole based D–π–A–π–D type linear chromophore for solution-processed bulk-heterojunction organic solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (9) ◽  
pp. 6286-6293 ◽  
Author(s):  
M. Nazim ◽  
Sadia Ameen ◽  
M. Shaheer Akhtar ◽  
Hyung-Kee Seo ◽  
Hyung-Shik Shin
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Solution Processed ◽  
Organic Chromophore

Novel furan-bridged thiazolo[5,4-d]thiazole based π-conjugated organic chromophore (RFTzR) was formulated and utilized for the fabrication of solution-processed small molecule organic solar cells (SMOSCs).

Phenoxazine-Based Small Molecule Material for Efficient Perovskite Solar Cells and Bulk Heterojunction Organic Solar Cells

2015 ◽  
Vol 5 (8) ◽  
pp. 1401720 ◽  
Author(s):  
Ming Cheng ◽  
Bo Xu ◽  
Cheng Chen ◽  
Xichuan Yang ◽  
Fuguo Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Perovskite Solar Cells

Benzoselenadiazole‐core asymmetric D‐A‐A small molecule for solution processed bulk heterojunction organic solar cells

2020 ◽  
Vol 44 (14) ◽  
pp. 12100-12111
Author(s):  
Abdullah ◽  
Eun‐Bi Kim ◽  
M. Shaheer Akhtar ◽  
Hyung‐Shik Shin ◽  
Sadia Ameen
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Solution Processed

Minimizing geminate recombination losses in small-molecule-based organic solar cells

2019 ◽  
Vol 7 (22) ◽  
pp. 6641-6648
Author(s):  
Rafael Sandoval-Torrientes ◽  
Alexey Gavrik ◽  
Anna Isakova ◽  
Abasi Abudulimu ◽  
Joaquín Calbo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Geminate Recombination ◽  
Recombination Rates ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

Geminate recombination rates are successfully predicted for series of small-molecule bulk heterojunction solar cells applying the Marcus–Levich–Jortner equation.

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.

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