NOVELTY - An optoelectronic device assembly (10) comprises a coated element and an optoelectronic device (24) on the coated element. The optoelectronic device is chosen from light emitting diode and photovoltaic cell. The coated element comprises transparent thermoplastic substrate (16) and protective weathering layer (12). The protective weathering layer has ultraviolet absorbance loss rate of 0.15 or less A/year at 330 nm, based on estimation from filtered xenon arc exposure and/or has rate of erosion of 5 mu m or less/year, based on estimation from filtered xenon arc exposure.    USE - Optoelectronic device assembly. Uses include but are not limited to photovoltaic module, Schottky barrier device, semiconductor device, diodes, memory arrays, photoresistor, photodetector and transistor.    ADVANTAGE - The economical optoelectronic device assembly has high weatherability, mechanical toughness, puncture resistance and water vapor resistance. The photovoltaic module using the optoelectronic device assembly has improved thermal absorption.    DETAILED DESCRIPTION - An optoelectronic device assembly comprises a coated element and an optoelectronic device on the coated element. The optoelectronic device is chosen from light emitting diode and photovoltaic cell. The coated element comprises transparent thermoplastic substrate and protective weathering layer. The transparent thermoplastic substrate comprises material chosen from aromatic polycarbonate and/or polyester. The protective weathering layer has ultraviolet absorbance loss rate of 0.15 or less A/year at 330 nm, based on estimation from filtered xenon arc exposure and/or has rate of erosion of 5 mu m or less/year, based on estimation from filtered xenon arc exposure.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic cross-sectional view of optoelectronic device assembly.    Optoelectronic device assembly (10)    Weathering layer (12)    Primer layer (14)    Substrate (16)    Leveling layer (18)    Barrier coating layer (20)    Adhesive layer (22)    Optoelectronic device (24)    Backing sheet (26)    Surface texture (30)    Additional substrate (32)