HEAT DEVELOPING PHOTORECEPTOR AND IMAGE FORMING METHOD USING THIS HEAT DEVELOPING PHOTORECEPTOR

PURPOSE:To obtain an image of high quality with desirable sensitization efficiency without the problem of reciprocity or the like even to high illuminance short-time exposure using a laser or the like by containing plural kinds of specific compounds. CONSTITUTION:A heat developing photoreceptor contains at least one of a compound expressed by a formula I and a compound expressed by a formula II, and also contains a compound expressed by a formula III. In the formula I, r -r , r -r are hydrogen atoms, halogen atoms, or the like, r , r are hydrogen atoms, alkyl groups, or the like, r -r are hydrogen atoms, aryl groups, or the like, X , X are oxygen atoms, sulfur atoms, or the like, Y1 is anion, O, P are 0, l, 2, and O+P us 2. In the formula II, Ar , Ar are hydrogen atoms, aryl groups, or the like, Ar , Ar are aryl groups, r -r are hydrogen atoms, alkyl groups, or the like, and Y2 is anion. In the formula III, R is a hydrogen atom, a halogen atom, or the lmke, R , R are aryl groups, R -R are hydrogen atoms, alkyl groups, or the like, X is an oxygen atom, a sulfur atom, or the lmke, X is an oxygen atom, a sulfur atom or a nmtrogen atom, X is an oxygen atom or a sulfur atom, and (k) is 1 or 2.