“…[88][89][90] In the field of energy, some natural products have found applications in photonics and photovoltaics. 91,92 They include amino acids, fatty acids, vitamins, carbohydrates, keratin, cellulose, and phenolic compounds, among others. [93][94][95][96] They can be added directly to precursor solutions to make thin films for optoelectronic devices, or they can be used indirectly as raw materials to make specific nanostructured materials.…”