Thermal annealing study on P3HT: PCBM based bulk heterojunction organic solar cells using impedance spectroscopy

2014 ◽  
Author(s):  
Sankara Rao Gollu ◽  
Ramakant Sharma ◽  
Srinivas G ◽  
Dipti Gupta
Keyword(s):  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Thermal Annealing ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Annealing Study

scholarly journals Characterization of ZnS-layer-inserted bulk-heterojunction organic solar cells by ac impedance spectroscopy

2009 ◽  
Vol 105 (12) ◽  
pp. 124513 ◽  
Author(s):  
Takayuki Kuwabara ◽  
Masayuki Nakamoto ◽  
Yoshitaka Kawahara ◽  
Takahiro Yamaguchi ◽  
Kohshin Takahashi
Keyword(s):  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Ac Impedance ◽  
Ac Impedance Spectroscopy

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%.

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.

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