(57) A photosensitive element comprising a silver halide emulsion having silver halide
grains containing an organic hole-trapping dopant. In a preferred embodiment said
dopant is represented by formula (I):
R-COOM (I)
wherein
R is hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted
aryl group, a substituted or unsubstituted aralkyl group or hetero-aryl group, and
M is hydrogen or any metal or organic group which can form a salt
or by formula (II):

wherein :
X and Y are independently selected from O, S, Se,
m is 1 and n is 1 or 2,
R1 and R2 are hydrogen, a substituted or unsubstituted alkyl group, a substituted
or unsubstituted aryl or aralkyl group or a substituted or unsubstituted heteroaryl
group, wherein R1 and R2 may be the same or different and may form a ring,
E represents a group linked to the carbon atom by a heteroatom, having at least one
free electron pair,
M+ is a proton or an organic or inorganic (metal) counterion. Moreover the invention provides a photosensitive element where said photosensitive
element can be a photoadressable thermographic element. The invention also provides
a method for preparing said photosensitive element comprising a support and on one
or both sides thereof at least one silver halide emulsion layer wherein the silver
halide grains are doped with an organic hole-trapping dopant according to formula
(I) or (II), optionally carried out in the presence of a oxidizing agent.
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