Very Low Degree of Energetic Disorder as the Origin of High Mobility in an n-channel Polymer Semiconductor

2011 ◽  
Vol 21 (17) ◽  
pp. 3371-3381 ◽  
Author(s):  
Mario Caironi ◽  
Matt Bird ◽  
Daniele Fazzi ◽  
Zhihua Chen ◽  
Riccardo Di Pietro ◽  
...  
Keyword(s):  
High Mobility ◽  
Low Degree ◽  
Polymer Semiconductor ◽  
Energetic Disorder

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

scholarly journals Non-Equilibrium Carrier Transport in Strongly Coupled Quantum Dot Solids and Heterostructures

2021 ◽  
Author(s):  
Mengxia Liu ◽  
Sachin Dev Verma ◽  
Zhilong Zhang ◽  
Jooyoung Sung ◽  
Akshay Rao
Keyword(s):  
Quantum Dot ◽  
Carrier Transport ◽  
Transient Absorption ◽  
High Mobility ◽  
Full Potential ◽  
Strongly Coupled ◽  
Transport Length ◽  
Energetic Disorder ◽  
Colloidal Quantum Dot ◽  
Non Equilibrium

Abstract Understanding and controlling carrier dynamics in colloidal quantum dot (CQD) solids is crucial for unlocking their full potential for optoelectronic applications. The recent development of solution-processing methods to incorporate CQDs into high-mobility semiconducting matrices opens new routes to control simultaneously electronic coupling and packing uniformity in CQD solids. However, the fundamental nature of carrier transport in such systems remains elusive. Here we report the direct visualisation of carrier propagation in metal-halide exchanged PbS CQD solids and quantum-dot-in-perovskite (QDiP) heterostructures via transient absorption microscopy. We reveal three distinct transport regimes: an initial band-like transport persisting over hundreds of femtoseconds, an Auger-assisted sub-diffusive transport before thermal equilibrium is achieved, and a final hopping regime at longer times. The band-like transport was observed to correlate strongly with the extent of carrier delocalisation and the degree of energetic disorder. By tailoring the perovskite content in heterostructures, we obtained a band-like transport length of 90 nm at room temperature and an equivalent diffusivity of up to 106 cm2 s-1 – which is four orders of magnitude higher than the steady-state values obtained for PbS CQD solids. These findings not only shed light on the non-equilibrium dynamics in CQD solids and their influence on carrier transport, but also introduce promising strategies to harness non-equilibrium transport phenomena for more efficient optoelectronic devices.

scholarly journals Electronic Structure, Electron-Phonon Coupling and Charge Transport in Crystalline Rubrene Under Mechanical Strain

2019 ◽  
Author(s):  
Michael Ruggiero ◽  
Sergio Ciuchi ◽  
Simone Fratini ◽  
Gabriele D'Avino
Keyword(s):  
Charge Transfer ◽  
Charge Transport ◽  
Mechanical Response ◽  
Compressive Strain ◽  
Mechanical Strain ◽  
High Mobility ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Transfer Integrals ◽  
Energetic Disorder

<div> <div> <div><p>Motivated by the potential for application of organic semiconductors in exible electronics, we present a theoretical study aiming at elucidating the interplay between mechanical strain and electronic, vibrational and charge transport properties of the prototypical high-mobility molecular semiconductor rubrene. Our study considers several factors that can play a role in the electro-mechanical response of a soft, van-der-Waals bonded, molecular crystal, such as intermolecular charge transfer integrals, lattice dynamics and electron phonon coupling. We find that compressive strain leads to an increase in magnitude of charge transfer integrals but also of the energetic disorder hampering the mobility. Charge transport simulations, based on the transient localization framework and fed with first-principles inputs, reveal a remarkably different response to strain applied along different crystal axes, in line with most recent experiments. The critical interplay between energetic disorder of intrinsic and extrinsic nature on the mobility-strain relationship is also discussed. The theoretical approach proposed in this work paves the way for the systematic study of the electro-mechanical response of different classes of high-mobility molecular semiconductors.</p></div> </div> </div>

scholarly journals A stable solution-processed polymer semiconductor with record high-mobility for printed transistors

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Jun Li ◽  
Yan Zhao ◽  
Huei Shuan Tan ◽  
Yunlong Guo ◽  
Chong-An Di ◽  
...  
Keyword(s):  
Stable Solution ◽  
High Mobility ◽  
Solution Processed ◽  
Polymer Semiconductor

Anisotropic Charge-Carrier Transport in High-Mobility Donor-Acceptor Conjugated Polymer Semiconductor Films

2016 ◽  
Vol 11 (19) ◽  
pp. 2725-2729 ◽  
Author(s):  
Zhiyuan Zhao ◽  
Hongtao Liu ◽  
Yan Zhao ◽  
Cheng Cheng ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Conjugated Polymer ◽  
Carrier Transport ◽  
High Mobility ◽  
Charge Carrier Transport ◽  
Semiconductor Films ◽  
Polymer Semiconductor ◽  
Donor Acceptor

Unraveling the Molar Mass Dependence of Shearing Induced Aggregation Structure of a High Mobility Polymer Semiconductor

2021 ◽  
pp. 2108255
Author(s):  
Zhongli Wang ◽  
Mengyuan Gao ◽  
Chunyong He ◽  
Weichao Shi ◽  
Yunfeng Deng ◽  
...  
Keyword(s):  
Molar Mass ◽  
High Mobility ◽  
Mass Dependence ◽  
Aggregation Structure ◽  
Polymer Semiconductor ◽  
Induced Aggregation

scholarly journals Decoupling Charge Transport and Electroluminescence in a High Mobility Polymer Semiconductor

2016 ◽  
Vol 28 (30) ◽  
pp. 6378-6385 ◽  
Author(s):  
David J. Harkin ◽  
Katharina Broch ◽  
Maximilian Schreck ◽  
Harald Ceymann ◽  
Andreas Stoy ◽  
...  
Keyword(s):  
Charge Transport ◽  
High Mobility ◽  
Polymer Semiconductor

scholarly journals Electronic Structure, Electron-Phonon Coupling and Charge Transport in Crystalline Rubrene Under Mechanical Strain

2019 ◽  
Author(s):  
Michael Ruggiero ◽  
Sergio Ciuchi ◽  
Simone Fratini ◽  
Gabriele D'Avino
Keyword(s):  
Charge Transfer ◽  
Charge Transport ◽  
Mechanical Response ◽  
Compressive Strain ◽  
Mechanical Strain ◽  
High Mobility ◽  
Phonon Coupling ◽  
Electron Phonon Coupling ◽  
Transfer Integrals ◽  
Energetic Disorder

<div> <div> <div><p>Motivated by the potential for application of organic semiconductors in exible electronics, we present a theoretical study aiming at elucidating the interplay between mechanical strain and electronic, vibrational and charge transport properties of the prototypical high-mobility molecular semiconductor rubrene. Our study considers several factors that can play a role in the electro-mechanical response of a soft, van-der-Waals bonded, molecular crystal, such as intermolecular charge transfer integrals, lattice dynamics and electron phonon coupling. We find that compressive strain leads to an increase in magnitude of charge transfer integrals but also of the energetic disorder hampering the mobility. Charge transport simulations, based on the transient localization framework and fed with first-principles inputs, reveal a remarkably different response to strain applied along different crystal axes, in line with most recent experiments. The critical interplay between energetic disorder of intrinsic and extrinsic nature on the mobility-strain relationship is also discussed. The theoretical approach proposed in this work paves the way for the systematic study of the electro-mechanical response of different classes of high-mobility molecular semiconductors.</p></div> </div> </div>

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