Abstract:
:The past few years have witnessed rapid advances in the synthesis of high-quality perovskite nanocrystals (PNCs). However, despite the impressive developments, the stability of PNCs remains a substantial challenge. The ability to reliably improve stability of PNCs while retaining their individual nanometer size represents a critical step that underpins future advances in optoelectronic applications. Here, we report an unconventional strategy for crafting dual-shelled PNCs (i.e., polymer-ligated perovskite/SiO2 core/shell NCs) with exquisite control over dimensions, surface chemistry, and stabilities. In stark contrast to conventional methods, our strategy relies on capitalizing on judiciously designed star-like copolymers as nanoreactors to render the growth of core/shell NCs with controlled yet tunable perovskite core diameter, SiO2 shell thickness, and surface chemistry. Consequently, the resulting polymer-tethered perovskite/SiO2 core/shell NCs display concurrently a stellar set of substantially improved stabilities (i.e., colloidal stability, chemical composition stability, photostability, water stability), while having appealing solution processability, which are unattainable by conventional methods.
journal_name
Sci Advjournal_title
Science advancesauthors
He Y,Yoon YJ,Harn YW,Biesold-McGee GV,Liang S,Lin CH,Tsukruk VV,Thadhani N,Kang Z,Lin Zdoi
10.1126/sciadv.aax4424subject
Has Abstractpub_date
2019-11-29 00:00:00pages
eaax4424issue
11issn
2375-2548pii
aax4424journal_volume
5pub_type
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