NOVELTY - Preparing-1 a lead selenide with an aromatic ligand, comprises: adding lead acetate and an aromatic ligand to a mixture of toluene and 1-octadecene to generate a first reaction mixture on a first container; heating the first reaction mixture at 250 degrees C and constantly stirring to generate a lead aromatic solution; adding selenium powder and trioctylphosphine to 1-octadecene to generate a second reaction mixture on a second container; heating the second reaction mixture at 250 degrees C and constantly stirring to generate a selenide solution; and adding the lead aromatic solution to selenide solution.    USE - The process is useful for preparing lead selenide with an aromatic ligand, preferably benzoic ligand (claimed), where the lead selenide is useful for manufacturing infrared detectors, semiconductors or solar cells.    ADVANTAGE - The process: provides simple and lows cost preparation of lead selenide in an opened environment; utilizes aromatic ligand, preferably benzoic acid, which provides robustness and more durability to the lead selenide, thus prevents the lead selenide from breaking or cracking easily and prevents the degradation and oxidation of the lead selenide, without affecting any of the lead selenide electronic and chemical characteristics.    DETAILED DESCRIPTION - Preparing a lead selenide with an aromatic ligand, comprises: adding lead acetate and an aromatic ligand to a mixture of toluene and 1-octadecene to generate a first reaction mixture on a first container; heating the first reaction mixture at first temperature of 250 degrees C and constantly stirring the first reaction mixture for 1 hour to generate a lead aromatic solution; adding selenium powder and trioctylphosphine to 1-octadecene to generate a second reaction mixture on a second container; heating the second reaction mixture at second temperature of 250 degrees C and constantly stirring the second reaction mixture for 20-30 minutes to generate a selenide solution; and adding the lead aromatic solution to selenide solution to generate lead selenide with aromatic ligand and a byproduct. An INDEPENDENT CLAIM is also included for preparing-2 a lead selenide with a benzoic ligand, comprising: adding lead acetate and recrystallized benzoic acid to a mixture of toluene and 1-octadecene to generate a first reaction mixture on a first container; heating the first reaction mixture at first temperature of 200 degrees C and constantly stirring the first reaction mixture for 1 hour to generate a lead benzoate solution; adding selenium powder and trioctylphosphine to 1-octadecene to generate a second reaction mixture on a second container; heating the second reaction mixture at second temperature of 200 degrees C and constantly stirring the second reaction mixture for 20-30 minutes to generate a selenide solution; and adding the lead benzoate solution to selenide solution to generate lead selenide with benzoic ligand and a byproduct.