NOVELTY - The method involves preparing solar cells (1). A photoluminescence image is obtained by irradiating light to the prepared solar cells. Conversion efficiency rating of the solar cells is determined according to brightness and 8-bit gray level of the obtained image and values obtained by measuring and averaging gray level of the image in pixel units of the solar cells. The solar cells are divided and separated according to the conversion efficiency rating. Defects of the solar cell caused by cracks, chipping and foreign objects are detected by determining the obtained image.    USE - Method for inspecting solar cells converting light energy into electric energy for an electronic device. Uses include but are not limited to a silicon solar cell, thin film solar cell, dye sensitized solar cell and an organic polymer solar cell for a mobile phone, personal digital assistant, magnetic disk, compact disk player, MPEG-1 audio layer-3 (MP3) player, notebook, digital camera and a camcorder.    ADVANTAGE - The method enables easily and simply determining photoelectric conversion efficiency of the solar cells configuring a solar cell module so as to separate the cells having better photoelectric conversion efficiency before a solar cell module is manufactured, thus manufacturing the solar cell module with excellent and uniform efficiency. The method enables conversion efficiency measurement using a photo-luminescence image, so that conversion efficiency rating of the solar cell can be easily determined within short period of process time without electrically connecting the solar cells through a general solar simulator and defects of the solar cells due to degradation in the conversion efficiency can be detected. The method enables loss of unnecessary raw materials to be reduced and defective incidence rate during manufacturing of the module to be minimized.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an apparatus for inspecting solar cells.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an apparatus for inspecting solar cells.    Solar cells (1)    Stage unit (10)    Light source unit (30)    Camera unit (50)    Camera (51)    Lens (53)    Filter (55)    Computer controller (100)