NOVELTY - Photovoltaic device (10) comprises three-dimensional multi-layered photovoltaic cell assembly in the form of panel; body portion assembly; and intermediate layer having layer material; cell and body portion assembly and intermediate layer includes values of elastic modulus, ultimate elongation, coefficient of thermal expansion and yield strength of cell, body portion and layer, where body portion assembly is partially surrounding portion of top surface and peripheral edge of cell assembly; and intermediate layer is partially disposed between cell and body portion assembly.    USE - As improved photovoltaic device with multilayered photovoltaic cell assembly useful to convert light energy into electricity; particularly for integrating into building structures e.g. roofing shingles or exterior wait coverings.    ADVANTAGE - The photovoltaic device are long lasting, cost effective, and can be easily installed, sealed against moisture and other environmental conditions and protected from mechanical abuse over desired lifetime of product, preferably 10-25 years, more preferably at least 25 years.    DETAILED DESCRIPTION - Photovoltaic device (10) comprises three-dimensional multi-layered photovoltaic cell assembly in the form of panel; body portion assembly; and intermediate layer having layer material; cell assembly, body portion assembly and intermediate layer includes values of elastic modulus, ultimate elongation, coefficient of thermal expansion and yield strength of cell, body portion and layer, where body portion assembly is comprised of body material with coefficient of linear thermal expansion (CLTE), and partially surrounding portion of top surface and peripheral edge of cell assembly; and intermediate layer is partially disposed between cell and body portion assembly, where layer elastic modulus which is 5% less than body portion/cell elastic modulus.    DESCRIPTION OF DRAWING(S) - The figure shows plan view of photovoltaic device.    Photovoltaic device (10)    Housing (310)