Electron transport at the interface of organic semiconductors and hydroxyl-containing dielectrics

2018 ◽  
Vol 6 (44) ◽  
pp. 12001-12005 ◽  
Author(s):  
Huihong Jiang ◽  
Zhuoting Huang ◽  
Guobiao Xue ◽  
Hongzheng Chen ◽  
Hanying Li
Keyword(s):  
Electron Transport ◽  
Organic Semiconductors ◽  
High Electron

High electron transport can be obtained at the interface of organic semiconductors and hydroxyl-containing dielectrics.

scholarly journals Electron Transport in Naphthalene Diimide Derivatives

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4026
Author(s):  
Jaroslaw Jung ◽  
Arkadiusz Selerowicz ◽  
Paulina Maczugowska ◽  
Krzysztof Halagan ◽  
Renata Rybakiewicz-Sekita ◽  
...  
Keyword(s):  
Electron Transport ◽  
Organic Semiconductors ◽  
Density Functional ◽  
Low Voltage ◽  
Operating Conditions ◽  
High Electron ◽  
Voltage Range ◽  
Light Emitting ◽  
Naphthalene Diimide ◽  
Naphthalene Diimides

Two naphthalene diimides derivatives containing two different (alkyl and alkoxyphenyl) N-substituents were studied, namely, N,N′-bis(sec-butyl)-1,4,5,8-naphthalenetetracarboxylic acid diimide (NDI-s-Bu) and N,N′-bis(4-n-hexyloxyphenyl)-1,4,5,8-naphthalenetetracarboxylic acid diimide (NDI-4-n-OHePh). These compounds are known to exhibit electron transport due to their electron-deficient character evidenced by high electron affinity (EA) values, determined by electrochemical methods and a low-lying lowest unoccupied molecular orbital (LUMO) level, predicted by density functional theory (DFT) calculations. These parameters make the studied organic semiconductors stable in operating conditions and resistant to electron trapping, facilitating, in this manner, electron transport in thin solid layers. Current–voltage characteristics, obtained for the manufactured electron-only devices operating in the low voltage range, yielded mobilities of 4.3 × 10−4 cm2V−1s−1 and 4.6 × 10−6 cm2V−1s−1 for (NDI-s-Bu) and (NDI-4-n-OHePh), respectively. Their electron transport characteristics were described using the drift–diffusion model. The studied organic semiconductors can be considered as excellent candidates for the electron transporting layers in organic photovoltaic cells and light-emitting diodes

scholarly journals Density-dependent electron transport and precise modeling of GaN high electron mobility transistors

2015 ◽  
Vol 107 (15) ◽  
pp. 153504 ◽  
Author(s):  
Sanyam Bajaj ◽  
Omor F. Shoron ◽  
Pil Sung Park ◽  
Sriram Krishnamoorthy ◽  
Fatih Akyol ◽  
...  
Keyword(s):  
Electron Transport ◽  
Electron Mobility ◽  
High Electron Mobility Transistors ◽  
High Electron ◽  
High Electron Mobility ◽  
Density Dependent ◽  
Electron Mobility Transistors

Fabricate Dye-Sensitized Solar Cell with Electrospining

2011 ◽  
Vol 335-336 ◽  
pp. 1117-1120
Author(s):  
Yun Yun Chu ◽  
Yu Chou Chao
Keyword(s):  
Solar Cell ◽  
Electron Transport ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Dye Sensitized Solar Cell ◽  
High Electron ◽  
Solar Cell Performance ◽  
Dye Sensitized ◽  
Viable Method

Dye adsorption on Ti02and electron transport in Ti02film are the two critical factors in determining efficiency of the the dye sensitized solar cell (DSSC). Increasing dye adsorption which increases the light harvesting is usually achieved by using nanoporous or nanoparticle Ti02films. Electron transport is determined by the inter-particle resistance of Ti02film. Electrospinning is a viable method for forming porous structure materials with high surface area. In this study, it was found that electrospinning is able to achieve good solar cell performance due to the high electron transport caused by the pores in the Ti02film.

Efficient blue-green molecular organic light emitting diodes based on novel silole derivatives

2002 ◽  
Vol 725 ◽  
Author(s):  
Leonidas C. Palilis ◽  
Hideyuki Murata ◽  
Antti J. Mäkinen ◽  
Manabu Uchida ◽  
Zakya H. Kafafia
Keyword(s):  
Electron Transport ◽  
Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Operating Voltage ◽  
High Electron ◽  
Blue Fluorescence ◽  
Light Emitting ◽  
Organic Light

AbstractWe report on highly efficient molecular organic light-emitting diodes (MOLEDs) using two novel silole derivatives as emissive and electron transport materials. A silole derivative, namely 2,5-di-(3-biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP), which shows blue fluorescence with a high photoluminescence quantum yield of 85% in the solid state, was used as the emissive material. Another silole derivative, namely 2,5-bis-(2‘2“-bipyridin-6-yl)-1,1- dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), that exhibits a non-dispersive high electron mobility of 2x10-4 cm2/Vsec was used as the electron transport material. MOLEDs using these two siloles and a common hole transport material show blue-green emission centered at 495 nm. This red-shifted electroluminescence (EL) band relative to the blue fluorescence of PPSPP is assigned to a PPSPP:NPB exciplex. A low operating voltage of 4.5 V was measured at a luminance of 100 cd/m2 and an EL quantum efficiency of 3.4% was achieved at 100 A/m2. To our knowledge, this is the highest EL quantum efficiency ever reported based on exciplex emission.

Theoretical Investigation of Structural Effects on the Charge Transfer Properties in Modified Phthalocyanines

MRS Advances ◽  
2015 ◽  
Vol 1 (7) ◽  
pp. 453-458 ◽  
Author(s):  
Patrick J. Dwyer ◽  
Stephen P. Kelty
Keyword(s):  
Organic Semiconductors ◽  
Electron Affinity ◽  
Density Functional ◽  
Reorganization Energy ◽  
High Electron ◽  
Optoelectronic Materials ◽  
Research Attention ◽  
Efficient Charge ◽  
Reorganization Energies ◽  
P Type

ABSTRACTFor efficient charge separation and charge transport in optoelectronic materials, small internal reorganization energies are desired. While many p-type organic semiconductors have been reported with low internal reorganization energies, few n-type materials with low reorganization energy are known. Metal phthalocyanines have long received extensive research attention in the field of organic device electronics due to their highly tunable electronic properties through modification of the molecular periphery. In this study, density functional theory (DFT) calculations are performed on a series of zinc-phthalocyanines (ZnPc) with various degrees of peripheral per-fluoroalkyl (-C3F7) modification. Introduction of the highly electron withdrawing groups on the periphery leads to a lowering in the energy of the molecular frontier orbitals as well as an increase in the electron affinity. Additionally, all molecules studies are found to be most stable in their anionic form, demonstrating their potential as n-type materials. However, the calculated internal reorganization energy slightly increases as a function of peripheral modification. By varying the degree of modification we develop a strategy for obtaining an optimal balance between low reorganization energy and high electron affinity for the development of novel n-type optoelectronic materials.

Intra-chain and inter-chain synergistic effect gives rise to high electron mobilities for naphthalenediimide based copolymers

2020 ◽  
Vol 8 (46) ◽  
pp. 16527-16532
Author(s):  
Lu Ning ◽  
Guangchao Han ◽  
Yuanping Yi
Keyword(s):  
Electron Transport ◽  
Synergistic Effect ◽  
High Electron

The influence of conformations and packing structures on electron transport was systematically revealed for NDI-based copolymers.

scholarly journals High-yielding rice Takanari has superior photosynthetic response to a commercial rice Koshihikari under fluctuating light

2019 ◽  
Vol 70 (19) ◽  
pp. 5287-5297 ◽  
Author(s):  
Shunsuke Adachi ◽  
Yu Tanaka ◽  
Atsuko Miyagi ◽  
Makoto Kashima ◽  
Ayumi Tezuka ◽  
...  
Keyword(s):  
Electron Transport ◽  
Stomatal Conductance ◽  
Metabolic Flux ◽  
Electron Transport Rate ◽  
Rice Cultivar ◽  
Carbon Gain ◽  
High Electron ◽  
Photosynthetic Induction ◽  
Photosynthetic Response ◽  
Fluctuating Light

The high-yielding rice cultivar Takanari has fast photosynthetic induction owing to a high electron transport rate, stomatal conductance, and metabolic flux, leading to high daily carbon gain under fluctuating light.

scholarly journals Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

2019 ◽  
Vol 7 (29) ◽  
pp. 8938-8945 ◽  
Author(s):  
Sudhir Kumar ◽  
Tommaso Marcato ◽  
Serhii I. Vasylevskyi ◽  
Jakub Jagielski ◽  
Katharina M. Fromm ◽  
...  
Keyword(s):  
Electron Transport ◽  
Electron Mobility ◽  
Light Emitting Diodes ◽  
High Electron ◽  
High Electron Mobility ◽  
Light Emitting ◽  
Anthracene Derivative

We report efficient perovskite nanocrystal LEDs based on a new electron transport material, BBIA, possessing high electron mobility of 4.17 × 10−4 cm2 V−1 s−1. BBIA-based devices exhibit a nearly two-fold enhancement than TPBi counterpart.

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