Makale detayı · 2017
High-Efficiency Optical Gain in Type-II Semiconductor Nanocrystals of Alloyed Colloidal Quantum Wells
Dergi
The Journal of Physical Chemistry LettersISSN 1948-7185
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- Yıl
- 2017
- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- YÖKSİS dergi adı The Journal of Physical Chemistry Letters
- Katalog eşleşmesi (ISSN) Journal of Physical Chemistry Letters
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Özet
OpenAlex · İngilizce
Colloidal nanocrystals having controlled size, tailored shape, and tuned composition have been explored for optical gain and lasing. Among these, nanocrystals having Type-II electronic structure have been introduced toward low-threshold gain. However, to date, their performance has remained severely limited due to diminishing oscillator strength and modest absorption cross-section. Overcoming these problems, here we realize highly efficient optical gain in Type-II nanocrystals by using alloyed colloidal quantum wells. With composition-tuned core/alloyed-crown CdSe/CdSe x Te 1– x quantum wells, we achieved amplified spontaneous emission thresholds as low as 26 μJ/cm 2, long optical gain lifetimes (τ gain ≈ 400 ps), and high modal gain coefficients ( g modal ≈ 930 cm –1 ). We uncover that the optical gain in these Type-II quantum wells arises from the excitations localized to the alloyed-crown region that are electronically coupled to the charge-transfer state. These alloyed heteronanostructures exhibiting remarkable optical gain performance are expected to be highly appealing for future display and lighting technologies.
Konular
Atıflar
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43 atıf
OpenAlex cited_by_count (önbellek / veritabanı)
Yerel katalogda bu makaleye atıf yapan 23 yayın (OpenAlex referans eşleşmesi; tam dünya listesi değildir).
- Giant Modal Gain Coefficients in Colloidal II–VI Nanoplatelets 2019
- Colloidal CdSe Quantum Wells with Graded Shell Composition for Low-Threshold Amplified Spontaneous Emission and Highly Efficient Electroluminescence 2019
- Two-Dimensional CdSe-Based Nanoplatelets: Their Heterostructures, Doping, Photophysical Properties, and Applications 2020
- Sub-single exciton optical gain threshold in colloidal semiconductor quantum wells with gradient alloy shelling 2020
- Sub-single exciton optical gain threshold in colloidal semiconductor quantum wells with gradient alloy shelling 2020
- Low-threshold lasing from colloidal CdSe/CdSeTe core/alloyed-crown type-II heteronanoplatelets 2018
- Highly Stable Multicrown Heterostructures of Type-II Nanoplatelets for Ultralow Threshold Optical Gain 2019
- Highly Stable Multicrown Heterostructures of Type-II Nanoplatelets for Ultralow Threshold Optical Gain 2019
- Coreless Fiber\u2010Based Whispering\u2010Gallery\u2010Mode Assisted Lasing from Colloidal Quantum Well Solids 2019
- Core-crown Quantum Nanoplatelets with Favorable Type-II Heterojunctions Boost Charge Separation and Photocatalytic NO Oxidation on TiO2 2020