Paint solar cell and its fabrication

A solar cell comprising an active structure including:

• a paint voltage source having
• a first paint layer structure comprising p-type pigment particles dispersed in a first-layer binder, and
• a second paint layer structure comprising n-type pigment particles dispersed in a second-layer binder, the second paint layer structure being in electrical contact with the first paint layer structure;
• and
• an electrically conductive contact structure having
• a first electrically conductive contact to the first paint layer structure, and
• a second electrically conductive contact to the second paint layer structure, at least one of the first electrically conductive contact and the second electrically conductive contact permitting light to pass therethrough to the paint voltage source.

A method for preparing a solar cell, comprising the steps of

• preparing a liquid first paint comprising p-type pigment particles, a first-paint binder, and a first paint liquid vehicle;
• preparing a liquid second paint comprising n-type pigment particles, a second-paint binder, and a second paint liquid vehicle;
• and
• fabricating the solar cell by
• applying a first layer of the liquid first paint and at least partially drying the liquid first paint by removing the first paint liquid vehicle, to leave a solid first paint layer structure comprising the p-type pigment particles and the first-paint binder,
• applying a second layer of the liquid second paint and drying the liquid second paint by removing the second paint liquid vehicle, to leave a solid second paint layer structure comprising the n-type pigment particles and the second-paint binder, the second layer being in facing contact with the first layer, and
• forming a first electrically conductive contact to the solid first paint layer structure and a second electrically conductive contact to the solid second paint layer structure, at least one of the first electrically conductive contact and the second electrically conductive contact permitting light to pass therethrough.