US4647400A
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US
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Luminescent material or phosphor having a solid matrix within which is distributed a fluorescent compound, its preparation process and its use in a photovoltaic cell
Assignee: Centre National de la Recherche Scientifique
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Filing: 1984-06-22
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Granted: 1987-03-03
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Expires: 2004-06-22
Abstract
Abstract The invention relates to a luminescent material or phosphor having a solid matrix within which is distributed a fluorescent compound, its preparation process and its use in a photovoltaic cell. This luminescent material comprises a solid matrix having groups able to form hydrogen bonds, e.g. glass, polyamide or polyvinyl alcohol, and an organic compound which, by internal torsion, can have an excited state with charge transfer, distributed in the matrix, such as para-N,N-dimethylaminobenzonitrile (DMABN) or N,N-1-bimethylamino-4-cyanonaphtalene.
Inventors
- 👤 Claudie C. Dubroca
- 👤 Agues Peirigua
- 👤 Philippe Cazeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:38
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
37 words
A luminescent material which comprises a solid matrix having groups able to form hydrogen bonds; and an organic compound able to form a twisted intramolecular charge transfer excited state, the organic compound being distributed in the matrix.
Claim 2
Dependent Claim
37 words
A luminescent material which comprises a solid matrix having groups able to form hydrogen bonds; and an organic compound able to form a twisted intramolecular charge transfer excited state, the organic compound being distributed in the matrix.
Claim 3
Dependent Claim
20 words
A material as set forth in claim 1, comprising at least 15.10 -5 % by weight of said organic compound.
Claim 4
Dependent Claim
125 words
A material as set forth in claim 1, wherein the organic compound has the formula: ##STR22## in which R 1 and R 2 , which can be the same or different, represent an alkyl radical, R 3 , R 4 , R 5 and R 6 , which can be the same or different, represent a hydrogen atom, a halogen atom, an alkyl radical or an alkoxy radical and X 1 represents --C.tbd.N, --COOR, ##STR23## --NO 2 or ##STR24## with R representing a hydrogen atom of an alkyl radical, or in wich N, R 1 and R 2 together from a cyclic radical chosen from among: ##STR25## with R representing a hydrogen atom or an alkyl radical and n being equal to 2 or 3.
Claim 5
Dependent Claim
15 words
A material as set forth in claim 3, wherein the organic compound is para-N,N-dimethylaminobenzonitrile (DMABN).
Claim 6
Dependent Claim
153 words
A material as set forth in claim 1, wherein the organic compound has the formula: ##STR26## in which R 1 and R 2 , which can be the same or different, represent an alkyl radical, R 3 , R 4 , R 5 , R 6 , R 7 and R 8 , which can be the same or different, represent a hydrogen atom, a halogen, an alkyl radical or an alkoxy radical and X 2 represents a hydrogen atom --CN, --COOR, ##STR27## --NO 2 or ##STR28## with R representing a hydrogen atom or an alkyl radical, or in which N, R 1 and R 2 can also together form a cyclic radical chosen from among: ##STR29## with R representing a hydrogen atom or an alkyl radical and n being equal to 2 or 3, provided that X 2 does not represent a hydrogen atom when R 1 and R 2 are alkyls.
Claim 7
Dependent Claim
14 words
A material as set forth in claim 5, wherein the organic compound is N,N-1-bimethylamino-4-cyanonaphthalene.
Claim 8
Dependent Claim
157 words
A material as set forth in claim 1, wherein the organic compound has the formula: ##STR30## in which R 1 and R 2 , which can be the same or different, represent an alkyl radical, R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and R 10 which, can be the same or different, represent a hydrogen atom, a halogen atom, an alkyl radical or an alkoxy radical and X 3 represents a hydrogen atom --CN, --COOR, ##STR31## --NO 2 or ##STR32## with R representing a hydrogen atom or an alkyl radical, or in which N, R 1 and R 2 can together form a cyclic radical chosen from among: ##STR33## with R representing a hydrogen atom or an alkyl radical and n being equal to 2 or 3 provided that X 3 is not a hydrogen atom when R 1 and R 2 are alkyls.
Claim 9
Dependent Claim
143 words
A material according to claim 1, wherein the organic compound has the formula: ##STR34## in which R 1 and R 2 , which can be the same or different, represent an alkyl radical, R 3 , R 4 , R 5 , R 6 , R 6 , R 8 , R 9 and R 10 represent a hydrogen atom, a halogen atom, an alkyl radical or an alkoxy radical, X 4 represents a hydrogen atom --CN, --COOR, ##STR35## or NO 2 with R representing a hydrogen atom or an alkyl radical, or in which N, R 1 and R 2 together form a cyclic radical chosen from among: ##STR36## with R representing a hydrogen atom, or an alkyl radical and n being equal to 2 or 3, provided that X 4 is not hydrogen when R 1 and R 2 are alkyls.
Claim 10
Dependent Claim
31 words
A material as set forth in any one of the claims 3 to 8, wherein all or part of the hydrogen atoms of the organic compound are replaced by deuterium atoms.
Claim 11
Dependent Claim
20 words
A material according to claim 1, wherein the matrix is a polymer or copolymer having --SH, --NH or --OH groups.
Claim 12
Dependent Claim
13 words
A material according to claim 1, wherein the matrix is made from glass.
Claim 13
Dependent Claim
16 words
A material according to claim 10, wherein the polymer is a polyvinyl alcohol or a polyamide.
Claim 14
Dependent Claim
27 words
A material according to claim 1, further comprising traces of at least one compound chosen from the group consisting of heavy water, alkyl iodides and polar solvents.
References Cited (Backward Citations)
US4208300A
Cited
FR2346858A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |