Reduction of Hydroxyl Traps and Improved Coupling for Efficient and Stable Quantum Dot Solar Cells

Autor:	Debranjan Mandal, Arup K. Rath, Neha V. Dambhare
Rok vydání:	2021
Předmět:	Electron mobility Materials science Passivation business.industry Halide Carrier lifetime law.invention Coupling (electronics) Quantum dot law Solar cell Optoelectronics General Materials Science business Layer (electronics)
Zdroj:	ACS Applied Materials & Interfaces. 13:46549-46557
ISSN:	1944-8252 1944-8244
DOI:	10.1021/acsami.1c11214
Popis:	Progress in quantum dot (QD)-based solar cells has been underpinned by the improvements in surface passivation and advancements in device engineering. Acute control over the surface properties is crucial to restrict the formation of in-gap trap states and improve the QD coupling in achieving conducting QD films. In this report, we demonstrate a solution-phase hybrid passivation strategy, which is beneficial in removing detrimental hydroxyl traps and improving the coupling between QDs by reducing the interdot distance. Advancement in surface passivation is translated to the long carrier lifetime, higher carrier mobility, and superior protection toward degradations in QD solids. The performance of solar cell devices is increased by 26% to reach an efficiency of 10.6%, compared to the state-of-the-art lead halide passivated solar cells. The improvement in solar cell performance is supported by the reduction of trap states and an 80 nm increase in thickness of the light-absorbing QD layer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42c090637811595319cb343d0b102cf7 https://doi.org/10.1021/acsami.1c11214 Zobrazit plný text záznamu