work function change
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2021 ◽  
Vol 7 (34) ◽  
pp. eabg8169
Author(s):  
Min Je Kim ◽  
Hwa Sook Ryu ◽  
Yoon Young Choi ◽  
Dong Hae Ho ◽  
Yoonjoo Lee ◽  
...  

An increase in the demand for completely foldable electronics has motivated efforts for the development of conducting polymer electrodes having extraordinary mechanical stability. However, weak physical adhesion at intrinsic heterojunctions has been a challenge in foldable electronics. This paper reports the completely foldable polymer thin-film transistors (PTFTs) and logic gate arrays. Homojunction-based PTFTs were fabricated by selectively doping p-type diketopyrrolopyrrole-based semiconducting polymer films with FeCl3 to form source/drain electrodes. The doping process caused a gradual work function change with depth, which promoted charge injection to semiconducting regions and provided a low contact resistance. In addition, the interfacial adhesion in the PTFTs was improved by interfacial cross-linking between adjacent component layers. The electrical performance of the resulting PTFTs was maintained without noticeable degradation even after extreme folding, suggesting that the proposed fabrication strategy can further be applied to various semiconducting polymers for the realization of foldable electronics.



2021 ◽  
Vol 154 (23) ◽  
pp. 234708
Author(s):  
Mikko-Heikki Mikkelä ◽  
Kari Jänkälä ◽  
Marko Huttula ◽  
Olle Björneholm ◽  
Maxim Tchaplyguine


2021 ◽  
Vol 11 (11) ◽  
pp. 5259
Author(s):  
Jen-Chuan Tung ◽  
Ding-Yuan Wang ◽  
Yu-Hsuan Chen ◽  
Po-Liang Liu

The work function variations of NO2 and H2S molecules on Pd-adsorbed ZnGa2O4(111) were calculated using first-principle calculations. For the bonding of a nitrogen atom from a single NO2 molecule to a Pd atom, the maximum work function change was +1.37 eV, and for the bonding of two NO2 molecules to a Pd atom, the maximum work function change was +2.37 eV. For H2S adsorption, the maximum work function change was reduced from −0.90 eV to −1.82 eV for bonding sulfur atoms from a single and two H2S molecules to a Pd atom, respectively. Thus, for both NO2 and H2S, the work function change increased with an increase in gas concentration, showing that Pd-decorated ZnGa2O4(111) is a suitable material in NO2/H2S gas detectors.



2020 ◽  
Vol 10 (24) ◽  
pp. 8822
Author(s):  
Jen-Chuan Tung ◽  
Yi-Hung Chiang ◽  
Ding-Yuan Wang ◽  
Po-Liang Liu

We performed first-principles total-energy density functional calculations to study the reactions of NO2 and H2S molecules on Ga–Zn–O-terminated ZnGa2O4(111) surfaces. The adsorption reaction and work functions of eight NO2 and H2S adsorption models were examined. The bonding of the nitrogen atom from a single NO2 molecule to the Ga atom of the Ga–Zn–O-terminated ZnGa2O4(111) surfaces exhibited a maximum work function change of +0.97 eV. The bond joining the sulfur atom from a single H2S molecule and the Ga atom of Ga–Zn–O-terminated ZnGa2O4(111) surfaces exhibited a maximum work function change of −1.66 eV. Both results concur with previously reported experimental observations for ZnGa2O4-based gas sensors.



Vacuum ◽  
2018 ◽  
Vol 152 ◽  
pp. 327-329 ◽  
Author(s):  
J. Trigueiro ◽  
N. Bundaleski ◽  
O.M.N.D. Teodoro


2015 ◽  
Vol 86 (5) ◽  
pp. 056111 ◽  
Author(s):  
A. Sabik ◽  
F. Gołek ◽  
G. Antczak


2013 ◽  
Vol 417 ◽  
pp. 012024
Author(s):  
Nenad Bundaleski ◽  
Ana G Silva ◽  
Bobbie Jean-Shaw ◽  
Orlando Teodoro ◽  
Augusto Moutinho


2012 ◽  
Vol 1402 ◽  
Author(s):  
Battulga Munkhbat ◽  
Bolormaa Gendensuren ◽  
Ganbaatar Tumenulzii ◽  
Rentsenmyadag Dashzeveg ◽  
Sarangerel Davaasambuu ◽  
...  

ABSTRACTThe work function of the indium tin oxide electrode (ITO) modified by a self-assembled monolayer (SAM), which is used as an electrode in organic electroluminescent (EL) devices, was investigated in this study. It is revealed that chemical modification of ITO with p-substituted with different terminal groups (NH2−, Cl−, and CF3−) benzoic acids as a SAMs material with carboxyl binding group is caused to increase the work function of the ITO electrode. Through a self-assembly process, the transmittance of the ITO with a SAM was not changed. The work function change of ITO with various SAM was measured by using cyclic voltammetry. Characteristics of EL devices were increased because the energy barrier was decreased in an interface between the ITO and an organic layer in the EL devices. The correlation of the work function change and the performance of the chemically modified EL devices was estimated.



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