Surface Traps in Colloidal Quantum Dots: A Combined Experimental and Theoretical Perspective

Carlo Giansante, Ivan Infante

Research output: Contribution to JournalArticleAcademicpeer-review


Surface traps are ubiquitous to nanoscopic semiconductor materials. Understanding their atomistic origin and manipulating them chemically have capital importance to design defect-free colloidal quantum dots and make a leap forward in the development of efficient optoelectronic devices. Recent advances in computing power established computational chemistry as a powerful tool to describe accurately complex chemical species and nowadays it became conceivable to model colloidal quantum dots with realistic sizes and shapes. In this Perspective, we combine the knowledge gathered in recent experimental findings with the computation of quantum dot electronic structures. We analyze three different systems: namely, CdSe, PbS, and CsPbI3 as benchmark semiconductor nanocrystals showing how different types of trap states can form at their surface. In addition, we suggest experimental healing of such traps according to their chemical origin and nanocrystal composition.

Original languageEnglish
Pages (from-to)5209-5215
Number of pages7
JournalJournal of Physical Chemistry Letters
Issue number20
Publication statusPublished - 3 Oct 2017

Bibliographical note

PMID: 28972763


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