scholarly journals Polymerized small molecular acceptor based all-polymer solar cells with an efficiency of 16.16% via tuning polymer blend morphology by molecular design

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jiaqi Du ◽  
Ke Hu ◽  
Jinyuan Zhang ◽  
Lei Meng ◽  
Jiling Yue ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molecular Design ◽  
Polymer Solar Cells ◽  
Energy Levels ◽  
Photovoltaic Performance ◽  
Electronic Energy ◽  
Force Microscopy ◽  
Transmission Electron ◽  
Electronic Energy Levels ◽  
20 Nm

AbstractAll-polymer solar cells (all-PSCs) based on polymerized small molecular acceptors (PSMAs) have made significant progress recently. Here, we synthesize two A-DA’D-A small molecule acceptor based PSMAs of PS-Se with benzo[c][1,2,5]thiadiazole A’-core and PN-Se with benzotriazole A’-core, for the studies of the effect of molecular structure on the photovoltaic performance of the PSMAs. The two PSMAs possess broad absorption with PN-Se showing more red-shifted absorption than PS-Se and suitable electronic energy levels for the application as polymer acceptors in the all-PSCs with PBDB-T as polymer donor. Cryogenic transmission electron microscopy visualizes the aggregation behavior of the PBDB-T donor and the PSMA in their solutions. In addition, a bicontinuous-interpenetrating network in the PBDB-T:PN-Se blend film with aggregation size of 10~20 nm is clearly observed by the photoinduced force microscopy. The desirable morphology of the PBDB-T:PN-Se active layer leads its all-PSC showing higher power conversion efficiency of 16.16%.

Biologically Engineered Quantum Dots for Biomedical Applications

2008 ◽  
Vol 1095 ◽  
Author(s):  
Ganna Chornokur ◽  
Sergei Ostapenko ◽  
Yusuf Emirov ◽  
Nadezhda Korsunska ◽  
Abraham Wolcott ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Levels ◽  
Local Stress ◽  
Blue Shift ◽  
Spectral Shift ◽  
Electronic Energy ◽  
Transmission Electron ◽  
Solid Substrates ◽  
Electronic Energy Levels ◽  
Electrophoresis Technique

AbstractWe report on a short-wavelength, “blue” spectral shift of the photoluminescence (PL) spectrum in CdSeTe/ZnS core/shell quantum dots (QDs) caused by bioconjugation with several monoclonal cancer related antibodies (ABs). Scanning PL spectroscopy was performed on samples dried on solid substrates at various temperatures. The influence of the AB chemical origin on the PL spectral shift was observed. The conjugation QD-AB reaction was confirmed using the agarose gel electrophoresis technique. The spectral shift is strongly increased and the process facilitated when the samples are dried above room temperature. The PL spectroscopic mapping revealed a profile of the PL spectral shift across the dried QD-AB spot. Transmission Electron Microscopy analyses of the samples were performed to reveal the shape and size of individual QDs. A mechanism of the “blue” shift is attributed to changes in the QD electronic energy levels caused by local stress field applied to the bio-conjugated QD.

Molecular design of a wide-band-gap conjugated polymer for efficient fullerene-free polymer solar cells

2017 ◽  
Vol 10 (2) ◽  
pp. 546-551 ◽  
Author(s):  
Delong Liu ◽  
Bei Yang ◽  
Bomee Jang ◽  
Bowei Xu ◽  
Shaoqing Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Conjugated Polymer ◽  
Molecular Design ◽  
Polymer Solar Cells ◽  
Photovoltaic Performance ◽  
Wide Band ◽  
Wide Band Gap

Two wide band gap polymer donors were developed for fullerene-free polymer solar cells. The photovoltaic performance of the PB3T:IT-M device processed by anisole achieved a high PCE of 11.9%.

Reduction of charge recombination in PbS colloidal quantum dot solar cells at the quantum dot/ZnO interface by inserting a MgZnO buffer layer

2017 ◽  
Vol 5 (1) ◽  
pp. 303-310 ◽  
Author(s):  
Xiaoliang Zhang ◽  
Erik M. J. Johansson
Keyword(s):  
Solar Cells ◽  
Quantum Dot ◽  
Buffer Layer ◽  
Energy Levels ◽  
Electronic Energy ◽  
Charge Recombination ◽  
Quantum Dot Solar Cells ◽  
Colloidal Quantum Dot ◽  
Improved Performance ◽  
Electronic Energy Levels

Colloidal quantum dot solar cells with an improved performance are reported by employing MgZnO as a buffer layer with tunable electronic energy levels in the solar cells to reduce interfacial charge recombination and hence improve charge collection.

Indacenodithiophene: a promising building block for high performance polymer solar cells

2017 ◽  
Vol 5 (22) ◽  
pp. 10798-10814 ◽  
Author(s):  
Yongxi Li ◽  
Minchao Gu ◽  
Zhe Pan ◽  
Bin Zhang ◽  
Xutong Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Building Block ◽  
High Performance ◽  
Polymer Solar Cells ◽  
Energy Levels ◽  
Photovoltaic Performance ◽  
Conjugated Materials ◽  
Factors Affecting ◽  
High Performance Polymer ◽  
Photovoltaic Applications

This review surveys recent research advances in the area of IDT-based conjugated materials for photovoltaic applications. The factors affecting the bandgaps, molecular energy levels, film morphologies, as well as the photovoltaic performance of these materials have also been discussed.

scholarly journals Phthalimide-based π-conjugated small molecules with tailored electronic energy levels for use as acceptors in organic solar cells

2015 ◽  
Vol 3 (34) ◽  
pp. 8904-8915 ◽  
Author(s):  
Arthur D. Hendsbee ◽  
Seth M. McAfee ◽  
Jon-Paul Sun ◽  
Theresa M. McCormick ◽  
Ian G. Hill ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Electronic Energy ◽  
Synthesis And Characterization ◽  
Design Synthesis ◽  
Electronic Energy Levels

The design, synthesis, and characterization of seven phthalimide-based organic π-conjugated small molecules are reported.

scholarly journals The ultra-violet spectrum of magnesium hydride. 1.—The band at λ 2430

1929 ◽  
Vol 122 (790) ◽  
pp. 442-455 ◽  
Keyword(s):  
Fine Structure ◽  
General Structure ◽  
Energy Levels ◽  
Visible Region ◽  
Ultra Violet ◽  
Present Theory ◽  
Magnesium Hydride ◽  
Electronic Energy ◽  
Band Spectra ◽  
Electronic Energy Levels

The system of bands in the visible region of the emission spectrum of magnesium hydride is now well known. The bands with heads at λλ 5622, 5211, 4845 were first measured by Prof. A. Fowler, who arranged many of the strongest lines in empirical series for identification with absorption lines in the spectra of sun-spots. Later, Heurlinger rearranged these series in the now familiar form of P, Q and R branches, and considered them, with the OH group, as typical of doublet systems in his classification of the fine structure of bands. More recently, W. W. Watson and P. Rudnick have remeasured these bands, using the second order of a 21-foot concave grating, and have carried out a further investigation of the fine structure in the light of the present theory of band spectra. Their detection of an isotope effect of the right order of magnitude, considered with the general structure of the system, and the experimental work on the production of the spectrum, seems conclusive in assigning these bands to the diatomic molecule MgH. The ultra-violet spectrum of magnesium hydride is not so well known. The band at λ 2430 and the series of double lines in the region λ 2940 to λ 3100, which were recorded by Prof. Fowler in 1909 as accompanying the group of bands in the visible region, appear to have undergone no further investigation. In view of the important part played by hydride band spectra in the correlation of molecular and atomic electronic energy levels, it was thought that a study of these features might prove of interest in yielding further information on the energy states of the MgH molecule. The present paper deals with observations on the band at λ 2430; details of an investigation of the other features of the ultra-violet spectrum will be given in a later communication.

Sign in / Sign up

Export Citation Format

Share Document