NOVELTY - Forming photovoltaic cell module involves continuously depositing the compositional graded coating on the photovoltaic cell using chemical vapor deposition, and subsequently, disposing the polymer layer on the compositional graded coating to form the module.    USE - For forming photovoltaic cell module (claimed), e.g. photovoltaic (solar) cells and diodes.    ADVANTAGE - The continuous operation of the chemical vapor deposition minimizes or eliminates formation of additional optical interfaces in the compositional graded coating which allows a gradient to be formed with minimized reflection, absorption, and interference and also allows the module to be formed with increased durability and flexibility and optimized optical properties.    DETAILED DESCRIPTION - Forming photovoltaic cell module comprising a photovoltaic cell (C1) having a refractive index of 3.7 plus minus 2; a polymer layer (L1) that is disposed on the photovoltaic cell and that has a refractive index of 1.5 plus minus 0.1, a compositional graded coating (C2) that is disposed on the photovoltaic cell and sandwiched between the photovoltaic cell and the polymer layer, that has a thickness and a refractive index varying along the thickness from a first refractive index from (2.2 plus minus 0.4 to 3.2 plus minus 0.4) at a first end to a second refractive index of 1.45 plus minus 0.05 at a second end adjacent to the polymer layer, and that comprises a gradient comprising SiC:H and SiOCN:H along the thickness, and Si:H disposed between the polymer layer and the photovoltaic cell, involves continuously depositing the compositional graded coating on the photovoltaic cell using chemical vapor deposition, and subsequently, disposing the polymer layer on the compositional graded coating to form the module. An INDEPENDENT CLAIM is included for photovoltaic cell module comprising the photovoltaic cell (C1), the polymer layer (L1) that is disposed on the photovoltaic cell, compositional graded coating (C2).