Semiconductor, functional device, electrochromic device, optical device, and image-taking unit
View Patent ↗A semiconductor comprises a compound (A) adsorbed on a surface of the semiconductor, the compound (A) having at least one lone electron pair and substantially not undergoing in oxidation-reduction reactions, wherein the presence of the compound (A) negatively changes a flat band potential of the semiconductor with reference to that when the compound is absent.
1. A semiconductor comprising
a compound (A) adsorbed on a surface of the semiconductor, the compound (A) having at least one lone electron pair and substantially not undergoing oxidation-reduction reactions,
wherein the presence of the compound (A) negatively changes a flat band potential of the semiconductor with reference to that when the compound is absent.
2. The semiconductor of claim 1 ,
wherein the compound (A) has at least one portion which can be adsorbed onto the surface of the semiconductor.
3. The semiconductor of claim 1 ,
wherein the compound (A) is a heterocyclic compound.
4. The semiconductor of claim 1 ,
wherein an atom having the lone electron pair is an N atom or an O atom.
5. The semiconductor of claim 1 ,
wherein the compound (A) is a five- or six-membered ring compound including an N atom or an O atom.
6. The semiconductor of claim 1 ,
wherein an atom having the lone electron pair has an electric charge of −0.40 or less.
7. The semiconductor of claim 1 ,
wherein an atom having the lone electron pair has an energy level of −11 eV or more.
8. The semiconductor of claim 1 ,
wherein the semiconductor is a nanoporous material.
9. A functional device comprising the semiconductor of claim 1 .
10. A photoelectric transducer comprising the semiconductor of claim 1 .
11. A photoelectrochemical cell, comprising the semiconductor of claim 1 .
12. An electrochromic device comprising the semiconductor of claim 1 .
13. The electrochromic device of claim 12 , having an optical density of 0.2 or less at a wavelength of 400 nm in a decolored state.
14. The electrochromic device of claim 12 ,
wherein a mean value of an optical density at a wavelength of from 400 to 500 nm, a mean value of an optical density at a wavelength of from 500 to 600 nm, and a mean value of an optical density at a wavelength of from 600 to 700 nm in a decolored state, are all 0.1 or less.
15. An optical device comprising:
an electromotive force-generating element for generating electromotive force in response to electromagnetic waves; and
the electrochromic device of claim 12 , driven by the electromotive force.
16. An image-taking unit comprising the optical device of claim 15 .
17. The image-taking unit of claim 16 , which is a single-use camera.