Monthly Archives: December 2018

Self-suspended nanomesh scaffold for ultrafast flexible photodetectors based on organic semiconducting crystals

Our group was involved in a study of transient photocurrent responses of self‐standing nanostructures. These devices are of fundamental interest in materials science and nanoscience and are widely used in (opto‐)electronic and photonic devices as well as in micro‐electromechanical systems. … Continue reading

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Negative field-dependent charge mobility in crystalline organic semiconductors with delocalized transport

Charge-carrier mobility has been investigated by time-of-flight (TOF) transient photocurrent in a lateral transport configuration in highly crystalline thin films of 2,7-dioctyl[1]benzothieno [3,2-b][1] benzothiophene (C8-BTBT) grown by a zone-casting alignment technique. High TOF mobility has been revealed that it is … Continue reading

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The effect of polymer molecular weight on the performance of PTB7-Th:O-IDTBR non-fullerene organic solar cells

Our group has been involved in a collaborative approach to study non-fullerene organic solar cells. Recent advances in the development of non-fullerene acceptors have increased the power conversion efficiency of organic solar cells to approximately 13%. Fullerene-derivatives and non-fullerene acceptors … Continue reading

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Charge carrier transport in polycrystalline CH3NH3PbI3 perovskite thin films in a lateral direction characterized by time-of-flight photoconductivity.

We used time-of-flight photocurrent measurements to determine the role of grain boundaries in charge carrier transport in thin layers of methyl ammonium lead iodide (CH3NH3PbI3). The measurement results were compared to Kinetic Monte Carlo simulations, based on a transport model, … Continue reading

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Fast-response photonic device based on organic-crystal heterojunctions assembled into a vertical-yet-open asymmetric architecture.

Our group was involved in collaboration to investigate fast photocurrent transients of crystalline dioctyl‐3,4,9,10‐perylenedicarboximide nanowires and 6,13‐bis(triisopropylsilylethynyl) pentacene microplates , which were integrated into a vertical‐yet‐open asymmetrical heterojunction for the realization of a high‐performance organic photovoltaic detector, which shows fast … Continue reading

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The role of local potential minima on charge transport in thin organic semiconductor layers

We have performed a systematic study of dependence of time-resolved photocurrent on the point of charge excitation within the organic semiconductor channel formed by two coplanar metal electrodes. The results confirm that spatial variation of electric field between the electrodes … Continue reading

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