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Fabrication of a visible light detector based on a coaxial polypyrrole/TiO2 nanorod heterojunction

A visible light detector can be fabricated using a coaxial polypyrrole/TiO2 nanorod composite. Based on the composite, the detector exhibits high responsivity up to 0.45 A W−1, impressive stability and excellent linear dependence of the photoresponse on visible light intensity. All of these properties make the polypyrrole/TiO2 nanorod composite very competitive and highly applicable in visible light detection.