carrier generation layer the carrier generation layer is made of an indium phthalocyanine having the general formula str1 wherein me represents indium and x is a halogen selected from the group consisting of chlorine bromine and iodine application_number US 1559987 A description preferred examples of this invention will now be in detail described as follows 12 8 g of o phthalodinitrile and 5 6 g of indium chloride incl 3 having a 99 999 purity were added to 100 ml of quinoline contained in a flask and the mixture were caused to react while refluxing them for about 40 minutes it was confirmed that the structure of the resulting product corresponds to phthalocyanine having the above described general formula furthermore as a result of element analysis of the product it was confirmed that the ratio of the elements was c 32 h 16 5 n 7 9 cl 1 1 in 0 9 so that the product was identified as phthalocyanine hereinafter referred to simply as 34 inclpc 34 having the aforementioned general formula wherein one cl is combined with me positioned at the central portion of the formula hereinafter referred to simply as 34 central metal 34 and having substantially an element ratio of c 32 h 16 n 8 cl 1 in 1 then 0 01 g of the inclpc was placed in an alumina crucible disposed in a vacuum evaporation coater and the temperature of the crucible was maintained at 400 u00b0 c during the vacuum vapor deposition to form a thin film.