A theoretical and experimental evaluation of III–nitride solar-blind UV photocathode
Ren Bin1, 2, 3, †, Guo Hui1, 3, Shi Feng1, 3, Cheng Hong-Chang1, 3, Liu Hui1, 3, Liu Jian4, Shen Zhi-Hui5, Shi Yan-Li3, Liu Pei6
       

Transmittance spectrum of sapphire/AlN/AlGaN heterostructure photocathode.