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We report all solid-state nanostructured inorganic-organic heterojunction solar cells fabricated by depositing Sb(2)S(3) and poly(3-hexylthiophene) (P3HT) on the surface of a mesoporous TiO(2) layer, where Sb(2)S(3) acts as an absorbing semiconductor and P3HT acts as both a hole conductor and light absorber. These inorganic-organic light harvesters perform remarkably well with a maximum incident-photon-to-current efficiency (IPCE) of 80% and power conversion efficiency of 5.13% under air-mass 1.5 global (AM 1.5G) illumination with the intensity of 100 mW cm(-2). These devices are highly stable under room light in air, even without encapsulation. The present findings offer novel directions for achieving high-efficiency solid-state solar cells by hybridization of inorganic-organic light harvesters and hole transporters.

The electrical injection of spin current in the lateral Permalloy/Au/Permalloy spin valve devices was investigated. Clear spin valve effects were found in nonlocal spin valve measurements. The spin diffusion length of Au was evaluated to be 168nm. High spin injection polarization of 26% at 15K was achieved from our samples with low interface resistance. The observed spin injection reveals the highest polarization among the reported values. This work demonstrates the high spin injection polarization through clean interface with low interface resistance.

We have demonstrated the successful fabrication of multiple-layer colloidal quantum dot (CQD)-sensitized near-infrared (NIR) photovoltaic (PV) cells using the solution processable HgTe CQDs and poly-3-(hexylthiophene) (P3HT) as hole-conducting polymer. The cells showed a 3.6 fold enhancement in power conversion efficiency under NIR light illumination by the post-ethanedithiol chemical treatment. The performance enhancement was mainly ascribed to the improved interfacial contact between HgTe CQDs by elimination of oleic acid as capping ligand on the surface of HgTe CQDs. In addition, the HgTe CQD-sensitized PV cells could effectively detect weak NIR light and process over 1 kHz level signals.

Iodide redox (3I À /I 3 À ), polysulfide redox (S 2À /S x 2À ), organic redox [TMTU/TMFDS 2+ : tetramethylthiourea/tetramethylformaminium-bis(trifluoromethanesulfonyl)imide], ferrocene redox (Fc/Fc + ), nickel redox [Ni(II)/Ni(III)], and cobalt redox [Co(II)/Co(III)] hole conducting electrolytes were systematically investigated to determine their suitability for use in Sb 2 S 3 -sensitized photoelectrochemical solar cells. A long-term stability test and UV-visible spectral analyses revealed that Sb 2 S 3 -sensitized photoelectrochemical solar cells worked stably with Co(II)(o-phen) 3 (TFSI) 2 /Co (III)(o-phen) 3 (TFSI) 3 [TFSI: bis(trifluoromethanesulfonyl)imide] as the redox mediator.