We demonstrate a novel, feasible strategy for practical application of one-dimensional photodetectors by integrating a carbon nanotube and TiO
2 in a core鈥搒
hell fashion for breaking t
he compromise between t
he photogain and t
he response/recovery speed. Radial Schottky barriers between carbon nanotube cores and TiO
2 s
hells and surface states at TiO
2 s
hell surface regulate electron transport and also facilitate t
he separation of photogenerated electrons and holes, leading to ultrahigh photogain (
G = 1.4 脳 10
4) and t
he ultrashort response/recovery times (4.3/10.2 ms). Additionally, radial Schottky junction and defect band absorption broaden t
he detection range (UV鈥搗isible). T
he concept using metallic core oxide鈥搒
hell geometry with radial Schottky barriers holds potential to pave a new way to realize nanostructured photodetectors for practical use.
Keywords:
hell&qsSearchArea=searchText">core鈭抯hell; TiO2; carbon nanotube; photodetector; photoresponse time