The interplay of electronic structure, molecular orientation and charge transport in organic semiconductors: Poly(thiophene) and poly(bithiophene)

Surface, interface and electronic properties of F8:F8BT polymeric thin films used for organic light‐emitting diode applications

“…S‐K edge XAS was carried out at the Brazilian Synchrotron Light Laboratory using the total electron yield detection mode. The experimental set‐up was the same as reported elsewhere . The angle between the radiation source and the substrate was changed to explore the polarization of the synchrotron radiation in order to study the molecular orientation of the films.…”

Fundamental Insights into Photoelectrocatalytic Hydrogen Production with a Hole-Transport Bismuth Metal–Organic Framework

“…These ultra-fast delocalization times are within the range of those calculated for a series of thiophene containing polymers. 50 It can be seen how electron delocalization times decrease as the excitation energy increases, meaning that electrons promoted to more energetic conduction band orbitals (such as σ* or Rydberg states) exhibit faster delocalization than when they are promoted to lower lying energy states such as π*. For a better understanding about charge photogeneration and transfer processes and their kinetic implications on the overall reaction pathways, a series of photophysical studies were performed.…”

Understanding ultrafast charge transfer processes in SnS and SnS2: using the core hole clock method to measure attosecond orbital-dependent electron delocalisation in semiconducting layered materials

“…CHC has been historically used to study simple adsorbates and individual molecules, such as self-assembly monolayers, where electron delocalisation times can be related to the degree of orbital overlapping between adsorbates and substrates. 21,22 In the last decade, the CHC method has been applied to study semiconducting materials, starting with the pioneering work of Rocco and Garcia-Basabe on a series of thiophene containing semiconducting polymers, [23][24][25][26] and with a couple of other groups following with incremental work on polymers and other complex conjugated systems. [27][28][29] These studies provide maps of delocalisation times across the conduction band of these semiconductor materials that have been related to the molecular composition, 30 structure, 23,24 morphology 31 and material interactions at different substrates and heterojunctions.…”

“…21,22 In the last decade, the CHC method has been applied to study semiconducting materials, starting with the pioneering work of Rocco and Garcia-Basabe on a series of thiophene containing semiconducting polymers, [23][24][25][26] and with a couple of other groups following with incremental work on polymers and other complex conjugated systems. [27][28][29] These studies provide maps of delocalisation times across the conduction band of these semiconductor materials that have been related to the molecular composition, 30 structure, 23,24 morphology 31 and material interactions at different substrates and heterojunctions. 27 However, as recognised in a recent 2020 publication, CHC studies of complex organic semiconductor materials are still scarce.…”

“…[34][35][36][37] In this sense, SnS2 has been studied in two publications, using different absorption edges and analysis approaches, that have provided somehow contradictory results. 36,37 Despite some CHC studies have been successfully used to compare different organic semiconductor materials and stablish structure-electron delocalisation times correlations, 23,26,28,38 studies on inorganic semiconductors have been limited to one material and also, to one absorption edge at a time. The measurement of two absorption edges for the same material has just been applied recently to a model organic semiconductor material and helped to provide completeness to the electron delocalisation maps and find orbital dependent differences in the electron dynamics within the same material.…”