Triplet Energy Transfer from CsPbBr3 Nanocrystals Enabled by Quantum Confinement

Journal of the American Chemical Society
Xiao LuoKaifeng Wu

Abstract

The spectral properties of lead halide perovskite nanocrystals (NCs) can be engineered by tuning either their sizes via the quantum confinement effect or their compositions using anion and/or cation exchange. To date, the latter is more frequently adopted, primarily because of the ease of ion exchange for lead halide perovskites, making the quantum confinement effect seemingly redundant for perovskite NCs. Here we report that quantum confinement is required for triplet energy transfer (TET) from perovskite NCs to polycyclic aromatic hydrocarbons (PAHs). Static and transient spectroscopy measurements on CsPbBr3 NC-pyrene hybrids showed that efficient TET occurred only for small-sized, quantum-confined CsPbBr3 NCs. The influences of the size-dependent driving force and spectral overlap on the TET rate were found to be negligible. Instead, the TET rate scaled linearly with carrier probability density at the NC surface, consistent with a Dexter-type TET mechanism requiring wave function exchange between the NC donors and pyrene acceptors. Efficient TET funnels the excitation energy generated in strongly light-absorbing perovskite NCs into long-lived triplets in PAHs, which may find broad applications such as photon upconversion and...Continue Reading

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Citations

Aug 24, 2019·The Journal of Chemical Physics·Qiongyi ShangTianquan Lian
Mar 20, 2020·PloS One·Sarah Wieghold, Lea Nienhaus
Aug 24, 2020·The Journal of Chemical Physics·Tao Jin, Tianquan Lian
May 29, 2021·The Journal of Physical Chemistry Letters·Sourav MaitiLaurens D A Siebbeles
May 18, 2021·Chemical Science·Loredana ProtesescuMircea Dincă
May 28, 2021·Chemical Science·Tingting HuangSean T Roberts
Jun 18, 2021·ACS Nano·Amrita DeyLakshminarayana Polavarapu
Aug 19, 2020·Journal of the American Chemical Society·Yishu Jiang, Emily A Weiss
Feb 20, 2020·Journal of the American Chemical Society·Junhui WangKaifeng Wu
Mar 14, 2019·The Journal of Physical Chemistry Letters·Yaoyao HanKaifeng Wu
Jun 28, 2019·The Journal of Physical Chemistry Letters·Sarah WiegholdLea Nienhaus
Sep 21, 2019·The Journal of Physical Chemistry Letters·Jeffrey T DuBose, Prashant V Kamat
Apr 21, 2020·The Journal of Physical Chemistry Letters·Yulu LiKaifeng Wu
Jun 2, 2020·Journal of the American Chemical Society·Xiao LuoKaifeng Wu
Aug 15, 2019·The Journal of Physical Chemistry Letters·Shan HeKaifeng Wu
Jan 3, 2020·The Journal of Physical Chemistry Letters·Sarah Wieghold, Lea Nienhaus
Jun 5, 2020·Journal of the American Chemical Society·Daniel T YonemotoFelix N Castellano
Nov 11, 2020·Journal of the American Chemical Society·Runchen LaiKaifeng Wu
Mar 3, 2020·The Journal of Physical Chemistry Letters·Yuyang TianKaifeng Wu
Nov 3, 2021·Journal of the American Chemical Society·Jeffrey T DuBose, Prashant V Kamat

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