Ingeniería molecular de terminación, conjugación y energética para células solares de perovskita invertida

Jiaonan Sun1,2,3, Jiarong Wang1,3, Ze-Fan Yao4

  • 1Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China.

Resumen

Los investigadores desarrollaron nuevos materiales de pasivación para las células solares de perovskita (PSC) reemplazando el amonio con terminales de carbamato. Esta estrategia mejora la estabilidad y la eficiencia de los dispositivos, logrando una eficiencia de conversión de potencia superior al 26% en las PSC y manteniendo el rendimiento en condiciones adversas.

Videos de Conceptos Relacionados

Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.1K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
674