Novel carrier doping in p-type semiconductors enhances photovoltaic device performance by increasing hole concentration

https://phys.org/news/2022-09-carrier-doping-p-type-semiconductors-photovoltaic.html

"impurity larger for vacant spaces in crystal lattice to invoke electrostatic repulsion. For alkali impurity  ions fall into interstitial sites and do not deform crystal lattice... potassium, rubidium, and cesium (Cs), as acceptor impurities in γ-CuI... Cs ions bind even more Cu vacancies, leading to greater concentration charge carriers (1013—1019 cm-3) in single crystals and thin-films prepared from solution... fine-tune carrier concentrations under low-temperature processing for specific applications and devices"

Related: Thin-film technologies for the energy transition

https://techxplore.com/news/2022-09-thin-film-technologies-energy-transition.html