Molecules with fast intersystem crossing characteristics can be used as components for sub-microsecond TADF exciplexes.

Fluorene-based hole transport materials (HTMs) with terminating thiophene units are explored, for the first time, for antimony sulfide (Sb 2 S 3 ) solar cells. These HTMs possess largely simplified synthesis processes and high yields compared to the conventional expensive hole conductors making them reasonably economical. The thiophene unit-linked HTMs have been successfully demonstrated in ultrasonic spray-deposited Sb 2 S 3 solar cells resulting in efficiencies in the range of 4.7−4.9% with an average visible transmittance (AVT) of 30−33% (400−800 nm) for the cell stack without metal contact, while the cells fabricated using conventional P3HT have yielded an efficiency of 4.7% with an AVT of 26%. The study puts forward cost-effective and transparent HTMs that avoid a post-coating activation at elevated temperatures like P3HT, devoid of parasitic absorption losses in the visible region and are demonstrated to be well aligned for the band edges of Sb 2 S 3 thereby ascertaining their suitability for Sb 2 S 3 solar cells and are potential candidates for semitransparent applications.

OLEDs based on lanthanide complexes have decisive optical advantages but are hampered by low brightness. Despite efforts to optimize several parameters such as quantum yield and charge carrier mobility, there...

The tribovoltaic devices have demonstrated an enormous current density output from friction. This has attracted attention, and thus, the tribovoltaic device research is expected to grow rapidly, providing mechanical energy harvesting from human motion or mechanical vibrations to power the microdevices. Herein, we are demonstrating the novel tribovoltaic device based on the W/WO 3 Schottky junction enabled by high-energy electrons as in hot-carrier photovoltaic devices. The hot carrier injection from the metal to the semiconductor has been well demonstrated before in light-driven devices but not demonstrated for tribovoltaic devices. Friction-caused electronic excitations on the W needle provide energy for electrons to overcome the Schottky barrier and generate the unbiased current density up to 1270 A m −2 . The amorphous WO 3 derived from magnetron sputtering shows high durability and reliability of the tribovoltaic device.

The targeted design of lanthanide-based emitters for solution-processed OLEDs was aimed at the combination of high luminescence efficiency with solubility and charge carrier mobility.