NOVELTY - A neutral luminescent solar concentrator device comprises a wavelength conversion layer having a top surface, a bottom surface, and an edge surface substantially perpendicular to the top surface and the bottom surface, where the wavelength conversion layer comprises a photostable chromophore configured to convert a first portion of the absorbed photons to a different wavelength to provide converted photons, and the top surface is configured to receive photons from a photon source and to allow the photons to be absorbed by the wavelength conversion layer.    USE - Neutral luminescent solar concentrator device for use in photovoltaic module (claimed), and window glass of buildings and cars.    ADVANTAGE - The device has neutral color, enhanced photoelectric conversion efficiency of a solar energy capture and conversion, high collection efficiency of both direct and diffuse light, and good heat dissipation from the large area of the collector plate in contact with air.    DETAILED DESCRIPTION - A neutral luminescent solar concentrator device comprises a wavelength conversion layer having a top surface, a bottom surface, and an edge surface substantially perpendicular to the top surface and the bottom surface, where the wavelength conversion layer comprises a photostable chromophore configured to convert a first portion of the absorbed photons to a different wavelength to provide converted photons, the top surface is configured to receive photons from a photon source and to allow the photons to be absorbed by the wavelength conversion layer, the edge surface is configured to expel a first portion of the converted photons out of the wavelength conversion layer and the bottom surface is configured to expel a second portion of converted photons out of the wavelength conversion layer as a transmitted light. INDEPENDENT CLAIMS are also included for the following:    (1) a photovoltaic module for conversion of solar light energy into electricity, comprising one or more photovoltaic device or solar cell, and the neutral luminescent solar concentrator, where the one or more photovoltaic device or solar cell is mounted to the edge surface of the neutral luminescent solar concentrator such that it receives the concentrated solar energy and converts that energy into electricity    (2) a method for using a neutral luminescent solar concentrator, which involves preparing a polymer matrix solution in a solvent, combining one or more a first chromophore having a first maximum absorption wavelength and one or more a second chromophore having a second maximum absorption wavelength into the polymer matrix solution to form a polymer matrix/chromophore solution, curing the polymer matrix/chromophore solution to form a wavelength conversion layer and affixing an edge of the wavelength conversion to a solar energy conversion device.