RT Journal Article
SR Electronic
T1 Unconventional route to dual-shelled organolead halide perovskite nanocrystals with controlled dimensions, surface chemistry, and stabilities
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaax4424
DO 10.1126/sciadv.aax4424
VO 5
IS 11
A1 He, Yanjie
A1 Yoon, Young Jun
A1 Harn, Yeu Wei
A1 Biesold-McGee, Gill V.
A1 Liang, Shuang
A1 Lin, Chun Hao
A1 Tsukruk, Vladimir V.
A1 Thadhani, Naresh
A1 Kang, Zhitao
A1 Lin, Zhiqun
YR 2019
UL http://advances.sciencemag.org/content/5/11/eaax4424.abstract
AB 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.