A new internal field-assisted photocathode based on Ag–O–Cs composite thin films
作者： Q.F Zhang , W.M Liu , Z.Q Xue , J.L Wu
DOI: 10.1016/S0038-1098(02)00190-4
关键词: Optics 、 Electric field 、 Nanoparticle 、 Substrate (electronics) 、 Optoelectronics 、 Transition metal 、 Electronic band structure 、 Photocathode 、 Thin film 、 Quantum yield 、 Materials science
摘要: Abstract Internal field-assisted Ag–O–Cs photocathode with sandwich-like structure was successfully fabricated by depositing a silver electrode on the surface of composite thin films that were pre-grown onto conductive glass substrate. Enhanced photoemission observed from when an internal assistant electric field applied to through designed structure. The total increase photoelectronic quantum yield corresponding 30 V bias about 15.7% while irradiated light wavelength 510 nm. Theoretical analysis indicates such enhanced can be attributed field-induced variations in energy-band films, including both decrease interfacial barrier between embedded Ag nanoparticles and CsxO (2≤x
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