The present work describes the development of an organic photodiode (OPD) receiver for high-speed optical wireless communication. To determine the optimal communication design, two different types of photoelectric conversion layers, bulk heterojunction (BHJ) and planar heterojunction (PHJ), are compared. The BHJ-OPD device has a −3 dB bandwidth of 0.65 MHz (at zero bias) and a maximum of 1.4 MHz (at −4 V bias). A 150 Mbps single-channel visible light communication (VLC) data rate using this device by combining preequalization and machine learning (ML)-based digital signal processing (DSP) is demonstrated. To the best of the authors' knowledge, this is the highest data rate ever achieved on an OPD-based VLC system by a factor of 40 over the previous fastest reported. Additionally, the proposed OPD receiver achieves orders of magnitude higher spectral efficiency than the previously reported organic photovoltaic (OPV)-based receivers.

The [2,3]sigmatropic rearrangement of allylic ammonium ylides generated by the reaction of N,N-dimethyl-1-alkyl-2-methylallylamines derived from terpene alcohols with diazo compounds in the presence of copper catalysts gave trisubstituted E-olefins in one-pot. In addition, a cyano substituent at the 2-position of N,N-dimethylallylamine increased the occurrence of the catalytic [2,3]sigmatropic rearrangement to give the corresponding bifunctional homoallylamines.

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[60]Fullerene derivatives with high thermal stability can be used for vacuum deposition under heating to fabricate thin films for organic electronic devices. Here, we investigated the thermal stability of [60]fullerene derivatives with various bulky substituents for thermal evaporation under vacuum by means of thermogravimetric analysis under reduced and normal pressure. We found sterically bulky groups such as tert‐butyl groups of [60]fullerene derivatives lowered the vacuum deposition temperature. Also, we performed isothermal thermogravimetric analysis to examine the long‐term thermal stability of the designed compounds under heating conditions. Furthermore, we investigated the UV‐Vis absorption patterns of the deposited films. Absorption in the blue wavelength range, which was attributed to intermolecular HOMO–LUMO transitions among the molecular orbitals of adjacent [60]fullerenes, was dramatically modified. These results were associated with the prevention of aggregation among neighboring [60]fullerene by the sterically bulky groups. This concept could contribute to expanding the use of evaporable [60]fullerene derivatives in organic thin‐film electronics research fields.

We have demonstrated a novel oxidative generation of ammonium ylides by employing allylic amines having a silyl group. Treatment of N-(α-silylmethyl)-N-allylic amines with an oxidant, followed by acetic anhydride, brought about a tandem Brook rearrangement/silicon Polonovski reaction via the generation of ammonium ylides to give the corresponding amides, whereas the reaction of N-(α-cyano-α-silylmethyl)-N-allylic amines with an oxidant afforded the corresponding formamides.