Organic‐inorganic hybrid photoelectric devices draw considerable attention because of their unique features by combining the relatively low ionization potential of the organic molecules and the high electron affinity of inorganic semiconductors. Hybrid organic‐inorganic poly(3‐hexylthiophene) (P3HT):CdSe nanowire heterojunction photodetectors are first demonstrated on silicon substrates, exhibiting a greatly enhanced photocurrent, a fast response, and a recovery time shorter than 0.1 s. Flexible hybrid photodetectors with excellent mechanical flexibility and stability are also fabricated on both poly(ethylene terephthalate) (PET) substrates and printing paper. The flexible devices are successfully operated under bending up to almost 180° and show an extremely high on/off switching ratio (larger than 500), a fast time response (about 10 ms), and excellent wavelength‐dependence, which are very desirable properties for its practical application in high‐frequency or high‐speed flexible electronic devices.

Highly flexible stacked and in-plane all-solid-state supercapacitors are fabricated on 3D hierarchical GeSe2 nanostructures with high performance, and, when configured as a self-powered photodetector nanosystem, can be used to power CdSe nanowire photodetectors.

Ordered WO 3 nanowire arrays on carbon cloth (WNCC) conductive substrates are successfully prepared by a facile hydrothermal method. The as-prepared samples were characterized by XRD, SEM and TEM and directly functionalized as supercapacitor (SC) and lithium-ion battery (LIB) electrodes without using any ancillary materials such as carbon black or binder. The unique structural features endow them with excellent electrochemical performance. The SCs demonstrate high specific capacitance of 521 F g À1 at 1 A g À1 and 5.21 F cm À2 at 10 A cm À2 and excellent cyclic performance with nearly 100% capacity retention after 2000 cycles at a current density of 3 A g À1 . All-solid-state SCs based on the integrated electrodes are also presented, exhibiting high flexibility without obvious performance declination at different bending states. A high capacity of 662 mA h g À1 after 140 cycles at a 0.28 C rate and excellent rate capabilities are also obtained for LIBs due to the unique structures of the integrated electrodes.