Bulk ion-clustering and surface ion-layering effects on work function of self-compensated charged-doped polymer semiconductors

2020 ◽  
Vol 7 (4) ◽  
pp. 1073-1082 ◽  
Author(s):  
Mervin Chun-Yi Ang ◽  
Cindy Guanyu Tang ◽  
Qi-Mian Koh ◽  
Chao Zhao ◽  
Qiu-Jing Seah ◽  
...  
Keyword(s):  
Work Function ◽  
Charge Injection ◽  
Polymer Semiconductors ◽  
Material Systems ◽  
Doped Polymer

Self-compensated hole- and electron-doped polyelectrolytes can afford 0.1 eV tuning steps in work function of charge injection/collection layers through the tethered anions. These material systems are further immune to ‘dopant’ migration.

scholarly journals Trap-Assisted Charge Injection into Large Bandgap Polymer Semiconductors

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2427 ◽  
Author(s):  
Dongdong Wang ◽  
Michael Fina ◽  
Suhan Kim ◽  
Chunmei Zhang ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Charge Injection ◽  
Model Systems ◽  
Light Emitting ◽  
Physical Mechanisms ◽  
Polymer Semiconductors ◽  
Transmission Electron ◽  
Polymer Light Emitting Diodes

The trap-assisted charge injection in polyfluorene-poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) model systems with an Al or Al/LiF cathode is investigated. We find that inserting 1.3 nm LiF increases electron and hole injections simultaneously and the increase of holes is greater than electrons. The evolution of internal interfaces within polymer light-emitting diodes is observed by transmission electron microscopy, which reveals that the introduction of LiF improves the interface stability at both the cathode (cathode/polymer) and the anode (indium tin oxide (ITO)/PEDOT:PSS). Above-mentioned experimental results have been compared to the numerical simulations with a revised Davids model and potential physical mechanisms for the trap-assisted charge injection are discussed.

Efficient charge injection from a high work function metal in high mobility n-type polymer field-effect transistors

2010 ◽  
Vol 96 (18) ◽  
pp. 183303 ◽  
Author(s):  
M. Caironi ◽  
C. Newman ◽  
J. R. Moore ◽  
D. Natali ◽  
H. Yan ◽  
...  
Keyword(s):  
Work Function ◽  
Field Effect ◽  
Field Effect Transistors ◽  
High Mobility ◽  
Charge Injection ◽  
High Work Function ◽  
Efficient Charge ◽  
High Work

Charge injection at interfaces between molecularly doped polymer thin films

2007 ◽  
Vol 90 (9) ◽  
pp. 092106 ◽  
Author(s):  
Richard A. Klenkler ◽  
Gu Xu ◽  
Zoran D. Popovic ◽  
John F. Graham
Keyword(s):  
Thin Films ◽  
Polymer Thin Films ◽  
Charge Injection ◽  
Doped Polymer

Evolution in the charge injection efficiency of evaporated Au contacts on a molecularly doped polymer

1998 ◽  
Vol 84 (3) ◽  
pp. 1439-1444 ◽  
Author(s):  
Andronique Ioannidis ◽  
John S. Facci ◽  
Martin A. Abkowitz
Keyword(s):  
Charge Injection ◽  
Injection Efficiency ◽  
Doped Polymer

Doped polymer semiconductors with ultrahigh and ultralow work functions for ohmic contacts

Nature ◽  
2016 ◽  
Vol 539 (7630) ◽  
pp. 536-540 ◽  
Author(s):  
Cindy G. Tang ◽  
Mervin C. Y. Ang ◽  
Kim-Kian Choo ◽  
Venu Keerthi ◽  
Jun-Kai Tan ◽  
...  
Keyword(s):  
Ohmic Contacts ◽  
Polymer Semiconductors ◽  
Work Functions ◽  
Doped Polymer

BIPOLARON DYNAMICS IN NON-DEGENERATE POLYMERS

2007 ◽  
Vol 21 (23n24) ◽  
pp. 4190-4195
Author(s):  
YONG-HONG YAN ◽  
CHANG-QIN WU ◽  
BAO-WEN LI
Keyword(s):  
Electric Field ◽  
Work Function ◽  
Dynamic Method ◽  
Charge Injection ◽  
Metal Structure ◽  
Metal Electrode ◽  
Dissociation Process ◽  
Injection Process ◽  
Polymer Metal ◽  
Metal Polymer

Bipolaron dynamics in non-degenerate polymers are discussed using the nonadiabatic dynamic method. First, charge injection process from metal electrode to a nondegenerate polymer in a metal/polymer/metal structure has been investigated. We demonstrate that the dynamical formation of a bipolaron sensitively depends on the work function of metal electrode. We also study the bipolaron dissociation process. It is found that the electric field that can dissociate the bipolaron is up to 106 V/cm, which is consistent with experiments.

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