Solar cell module having upconversion nano-particles and method of manufacturing the solar cell module

A solar cell module, comprising:

• a solar cell including unit battery cells electrically connected to each other via connection electrodes;
• an upper cover disposed on a front face of the solar cell;
• a light-conversion coating layer coated on an inner face of the upper cover and comprising a transparent matrix layer and upconversion nano-particles for absorbing near-infrared rays and emitting light having a wavelength in a visible region;
• a lower cover disposed on a rear face of the solar cell;
• a first filling material layer formed between the solar cell and the light-conversion coating layer;
• and
• a second filling material layer formed between the solar cell and the lower cover,
• wherein the upconversion nano-particles comprising NaYF4 doped with ytterbium (Yb) and erbium (Er) are dispersed in a material including a photoresist of the transparent matrix layer,
• wherein a mass ratio of the upconversion nano-particles comprising NaYF4, Yb and Er to the material including the photoresist of the transparent matrix layer is greater than 1:10 and less than 1.5, and
• wherein the first and second filling material layers are formed to directly contact front and rear surfaces of the solar cell, respectively.