Claims
- 1. A photosensitive element comprising a silver halide emulsion having silver halide grains containing an organic hole-trapping dopant, wherein said dopant is an agent releasing one or more electron(s) for reaction with a positive hole formed in the silver halide lattice after absorption of a photon, wherein said agent is incorporated in the silver halide lattice and wherein said organic hole trapping dopant has a formula as follows: wherein M+ is any metal which forms a salt with the sulfinic acid group.
- 2. A photosensitive element according to claim 1, wherein the organic hole-trapping dopant is present in an amount of from 50 p.p.m. up to 10−2 mole per mole of silver halide.
- 3. A photosensitive element according to claim 1, wherein the silver halide emulsion contains at least one J-aggregating dye as spectral sensitizer.
- 4. A photosensitive element according to claim 3, wherein the silver halide emulsion containing a spectral sensitizer further comprises a J-aggregate tuning product.
- 5. A photosensitive element according to claim 4, wherein the J-aggregate tuning product is a photographic stabilizer.
- 6. A photosensitive element according to claim 1, wherein the silver halide is composed of at least one halide selected from the group consisting of chloride, bromide and iodide.
- 7. A photosensitive element according to claim 1, wherein the silver halide contains at least 10 mole percent of bromide.
- 8. A photosensitive element according to claim 1, wherein the silver halide emulsion contains silver halide grains having a mean spherical equivalent diameter SED between 0.01 and 2.0 μm.
- 9. A photosensitive element according to claim 1, wherein the silver halide grains containing a hole-trapping dopant are grains having a core and an outermost shell and the said outermost shell comprises said hole-trapping dopant.
- 10. A photosensitive element according to claim 9, wherein the shell contains less than 95 percent of the silver present in the grains.
- 11. A photosensitive element according to claim 1, wherein said element is a photoaddressable thermographic element, comprising a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder.
- 12. A method for preparing a photosensitive element comprising a support and on one or both sides thereof at least one silver halide emulsion layer, comprising silver halide grains precipitated in the presence of an organic hole-trapping dopant, wherein said dopant is an agent releasing one or more electron(s) for reaction with a positive hole formed in the silver halide lattice after absorption of a photon, wherein said agent is incorporated in the silver halide lattice and wherein said organic hole trapping dopant has a formula as follows: wherein M+ is any metal which forms a salt with the sulfinic acid group.
- 13. A method according to claim 12, wherein an oxidizing agent is present together with said organic hole-trapping dopant.
- 14. A method according to claim 13, wherein the oxidizing agent is a p-toluene thiosulphonic acid or a salt thereof.
- 15. A method for preparing a photosensitive silver halide element according to claim 12, wherein the precipitation is performed under conditions of pH and pAg as follows:pH in a range from 1 up to 10, and pAg in a range from 2 up to 9.
Priority Claims (1)
Number |
Date |
Country |
Kind |
97203897 |
Dec 1997 |
EP |
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Parent Case Info
This application claim benefit to provisional Application No. 60/073,789 Feb. 5, 1998.
US Referenced Citations (7)
Provisional Applications (1)
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Number |
Date |
Country |
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60/073789 |
Feb 1998 |
US |