Photovoltaic device

A photovoltaic device comprising:

• a first photovoltaic cell configured to perform photovoltaic power generation by using, as irradiation light, light generated by a light source device including a laser light source or a discharge lamp light source;
• and
• a second photovoltaic cell spaced away from the first photovoltaic cell,
• wherein the first photovoltaic cell is inclined relative to the irradiation light at a prescribed inclination angle,
• when a light amount of the irradiation light applied to the first photovoltaic cell is at a maximum, a light amount per unit area in a light receiving portion of the first photovoltaic cell is defined as a maximum irradiance, and a maximum value of a light amount per unit area that can be used by the first photovoltaic cell for power generation is defined as a maximum power generation effective irradiance, and
• the inclination angle of the first photovoltaic cell is set such that
• the maximum irradiance exceeds the maximum power generation effective irradiance in a virtual state where the first photovoltaic cell is not inclined relative to the irradiation light, and
• the maximum irradiance does not exceed the maximum power generation effective irradiance in an actual state where the first photovoltaic cell is inclined relative to the irradiation light, and
• wherein a portion of the irradiation light applied to the first photovoltaic cell is reflected by the first photovoltaic cell and becomes reflected irradiation light applied to the second photovoltaic cell, and
• wherein the second photovoltaic cell is inclined relative to the reflected irradiation light.