Charge separation and transport in conjugated-polymer/semiconductor-nanocrystal composites studied by photoluminescence quenching and photoconductivity

1996 ◽  
Vol 54 (24) ◽  
pp. 17628-17637 ◽  
Author(s):  
N. C. Greenham ◽  
Xiaogang Peng ◽  
A. P. Alivisatos
Keyword(s):  
Charge Separation ◽  
Conjugated Polymer ◽  
Photoluminescence Quenching ◽  
Semiconductor Nanocrystal ◽  
Polymer Semiconductor

Photoconductive Properties of MEH-PPV/InP Nanocomposite Diode

2012 ◽  
Vol 531 ◽  
pp. 31-34 ◽  
Author(s):  
Ya Ting Zhang ◽  
Jian Quan Yao
Keyword(s):  
Chemical Reaction ◽  
Charge Separation ◽  
Conjugated Polymer ◽  
Ground States ◽  
Surface States ◽  
Band Edge ◽  
Semiconductor Nanocrystal ◽  
Efficient Charge ◽  
Very High ◽  
Photocurrent Spectra

InP nanocrystals were prepared by an economic chemical reaction. A very high density of surface states is found at 0.5 eV below the intrinsic conductive band edge. Mixing these InP nanocrystals with MEH-PPV, obtained the composite. Devices with structure ITO/composite(MEH-PPV)/Al were fabricated and investigated. Photocurrent spectra showed that the interface between a conjugated polymer and a semiconductor nanocrystal can be used to provide efficient charge separation for neutral excitons on both the ground states and excited ones. Incorporation of nanocrystals, the conductivity of diode shows large improvements.

scholarly journals A high-spin ground-state donor-acceptor conjugated polymer

2019 ◽  
Vol 5 (5) ◽  
pp. eaav2336 ◽  
Author(s):  
A. E. London ◽  
H. Chen ◽  
M. A. Sabuj ◽  
J. Tropp ◽  
M. Saghayezhian ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Spin ◽  
Ground State ◽  
Conjugated Polymer ◽  
Organic Materials ◽  
Energy Gap ◽  
Light Element ◽  
Paramagnetic Resonance ◽  
Practical Applications ◽  
Polymer Semiconductor

Interest in high-spin organic materials is driven by opportunities to enable far-reaching fundamental science and develop technologies that integrate light element spin, magnetic, and quantum functionalities. Although extensively studied, the intrinsic instability of these materials complicates synthesis and precludes an understanding of how fundamental properties associated with the nature of the chemical bond and electron pairing in organic materials systems manifest in practical applications. Here, we demonstrate a conjugated polymer semiconductor, based on alternating cyclopentadithiophene and thiadiazoloquinoxaline units, that is a ground-state triplet in its neutral form. Electron paramagnetic resonance and magnetic susceptibility measurements are consistent with a high-to-low spin energy gap of 9.30 × 10−3 kcal mol−1. The strongly correlated electronic structure, very narrow bandgap, intramolecular ferromagnetic coupling, high electrical conductivity, solution processability, and robust stability open access to a broad variety of technologically relevant applications once thought of as beyond the current scope of organic semiconductors.

scholarly journals Charge transport in conjugated polymer–semiconductor nanoparticle composite near the percolation threshold

2017 ◽  
Vol 123 (12) ◽  
Author(s):  
L. S. Cardoso ◽  
G. E. Gonçalves ◽  
D. H. F. Kanda ◽  
R. F. Bianchi ◽  
H. N. Nagashima
Keyword(s):  
Charge Transport ◽  
Percolation Threshold ◽  
Conjugated Polymer ◽  
Semiconductor Nanoparticle ◽  
Polymer Semiconductor

A pseudo-two-dimensional conjugated polysquaraine: an efficient p-type polymer semiconductor for organic photovoltaics and perovskite solar cells

2018 ◽  
Vol 6 (28) ◽  
pp. 13644-13651 ◽  
Author(s):  
Qi Xiao ◽  
Fei Wu ◽  
MengMeng Han ◽  
Zhen Li ◽  
LinNa Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymer ◽  
Polymer Solar Cells ◽  
Perovskite Solar Cells ◽  
Two Dimensional ◽  
Free Hole ◽  
Polymer Semiconductor ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
P Type

A new squaraine-based 2D conjugated polymer was developed as the donor material in polymer solar cells and dopant-free hole transporting material in inverted perovskite solar cells, reaching efficiencies of 6.35% and 18.29%, respectively.

Anisotropy of Charge Transport in a Uniaxially Aligned and Chain-Extended, High-Mobility, Conjugated Polymer Semiconductor

2011 ◽  
Vol 21 (5) ◽  
pp. 932-940 ◽  
Author(s):  
Mi Jung Lee ◽  
Dhritiman Gupta ◽  
Ni Zhao ◽  
Martin Heeney ◽  
Iain McCulloch ◽  
...  
Keyword(s):  
Charge Transport ◽  
Conjugated Polymer ◽  
High Mobility ◽  
Polymer Semiconductor
Sign in / Sign up

Export Citation Format

Share Document