Jing Lu

TL;DR: A model of the passivation mechanism is proposed to understand how the molecules simultaneously passivate the Pb-I antisite defects and vacancies created by under-coordinated Pb atoms, and how the energy offset between the semiconducting molecules and the perovskite influences trap states and intergrain carrier transport.

TL;DR: In this paper, a Ruddlesden-Popper (RP) perovskite heterostructure passivated by semiconducting molecules is reported, which systematically addresses both charge dynamics and degradation mechanisms in concert for cesium-free FAPbI3 solar cells, delivering a power-conversion efficiency as high as 20.62% and remarkable long-term ambient stability with a t80 lifetime exceeding 2880 hours without encapsulation.

TL;DR: It is demonstrated that the underlying 3D phase templates growth of quantum wells within 2D capping layer is influenced by the fluorination of spacers and compositional engineering in terms of thickness distribution and orientation, which results in higher charge mobility and lower charge recombination loss at the 2D/3D heterojunction.

TL;DR: The morphological and optoelectronic characterizations unambiguously demonstrate that the additive enables a larger grain size, a smoother surface, and a gradient distribution of QW thickness, which lead to enhanced photocurrent transport/extraction through efficient charge transfer between low-n and high-n QWs and suppressed nonradiative charge recombination.

TL;DR: In this article, high-quality CsPbI3 films are grown via introducing a low concentration of the multifunctional molecular additive Zn(C6 F5 )2, which reconciles the conflict between air-flow-assisted fast drying and low-quality film including energy misalignment and trap formation.