This paper describes recent progress on the development of high polarization photocathodes for polarized electron sources. A strained InGaAs cathode has achieved a maximum electron-spin polarization of 71% and has demonstrated the strain enhancement of polarization for the first time. Strained GaAs cathodes have yielded polarizations as high as 90% with much higher quantum efficiency. 1 c Intro...

A durable molecular photocathode driving CO2 reduction with over 1200 of turnover number was developed by electropolymerization Ru(ii) complexes. The cell a suitable photoanode enabled H2O oxidation no bias for 24 h.

Developing durable Si-based photoelectrochemical hydrogen evolution reaction in alkaline media is attracting attention device-level water splitting, but still faces a trade-off between the alkalic corrosion resistance and light transmission for Si photocathodes. Herein, synergetic strategy proposed to employ an anti-reflective Co-P film cocatalyst modulated via self-assembly of protective-layer...

We are developing a new photon detector with micro pattern gaseous detectors. A semitransparent CsI photocathode is combined with 10cm×10cm GEM/μPIC for the first prototype which is aimed for the large liquid Xe detectors. Using Ar+C2H6 (10%) gas, we achieved the gas gain of 10 which is enough to detect single photoelectron. We, then, irradiated UV photons from a newly developed solid scintilla...