Evaluating the role of energetic disorder and thermal activation in exciton transport

2016 ◽  
Vol 4 (16) ◽  
pp. 3437-3442 ◽  
Author(s):  
S. Matthew Menke ◽  
Russell J. Holmes
Keyword(s):  
Organic Semiconductors ◽  
Thermal Activation ◽  
Diffusion Length ◽  
Temperature Dependent ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Exciton Transport ◽  
Energetic Disorder ◽  
Boron Subphthalocyanine

Temperature dependent measurements of the exciton diffusion length (LD) are performed for three archetypical small-molecule, organic semiconductors: aluminum tris-(8-hydroxyquinoline) (Alq3), dicyanovinyl-terthiophene (DCV3T), and boron subphthalocyanine chloride (SubPc).

Role of impurities in determining the exciton diffusion length in organic semiconductors

2016 ◽  
Vol 108 (16) ◽  
pp. 163301 ◽  
Author(s):  
Ian J. Curtin ◽  
D. Wayne Blaylock ◽  
Russell J. Holmes
Keyword(s):  
Organic Semiconductors ◽  
Diffusion Length ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length

scholarly journals Long-range exciton diffusion in molecular non-fullerene acceptors

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuliar Firdaus ◽  
Vincent M. Le Corre ◽  
Safakath Karuthedath ◽  
Wenlan Liu ◽  
Anastasia Markina ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Diffusion Length ◽  
Crystal Packing ◽  
Maximum Size ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Donor And Acceptor ◽  
Wide Range ◽  
20 Nm ◽  
End Group

Abstract The short exciton diffusion length associated with most classical organic semiconductors used in organic photovoltaics (5-20 nm) imposes severe limits on the maximum size of the donor and acceptor domains within the photoactive layer of the cell. Identifying materials that are able to transport excitons over longer distances can help advancing our understanding and lead to solar cells with higher efficiency. Here, we measure the exciton diffusion length in a wide range of nonfullerene acceptor molecules using two different experimental techniques based on photocurrent and ultrafast spectroscopy measurements. The acceptors exhibit balanced ambipolar charge transport and surprisingly long exciton diffusion lengths in the range of 20 to 47 nm. With the aid of quantum-chemical calculations, we are able to rationalize the exciton dynamics and draw basic chemical design rules, particularly on the importance of the end-group substituent on the crystal packing of nonfullerene acceptors.

scholarly journals Correction: Evaluating the role of energetic disorder and thermal activation in exciton transport

2016 ◽  
Vol 4 (31) ◽  
pp. 7508-7508
Author(s):  
Thomas R. Fielitz ◽  
S. Matthew Menke ◽  
Russell J. Holmes
Keyword(s):  
Thermal Activation ◽  
Exciton Transport ◽  
Energetic Disorder

Correction for ‘Evaluating the role of energetic disorder and thermal activation in exciton transport’ by S. Matthew Menke et al., J. Mater. Chem. C, 2016, 4, 3437–3442.

Systematic study of exciton diffusion length in organic semiconductors by six experimental methods

2014 ◽  
Vol 1 (2) ◽  
pp. 280-285 ◽  
Author(s):  
Jason D. A. Lin ◽  
Oleksandr V. Mikhnenko ◽  
Jingrun Chen ◽  
Zarifi Masri ◽  
Arvydas Ruseckas ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Systematic Study ◽  
Diffusion Length ◽  
Experimental Methods ◽  
Chemical Modifications ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length

Six techniques are used to measure the exciton diffusion length as a function of systematic chemical modifications.

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