Browsing by Author "Shendre, S."

Now showing items 1-16 of 16

    • Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage 

      İzmir, M.; Sharma, A.; Shendre, S.; Durmuşoğlu, E. G.; Sharma, V. K.; Shabani, Farzan; Baruj, Hamed Dehghanpour; Delikanlı, Savaş; Sharma, M.; Demir, Hilmi Volkan (American Chemical Society, 2021-12-28)
      Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence ...

    • CdSe/CdMnS nanoplatelets with bilayer core and magnetically doped shell exhibit switchable excitonic circular polarization: Implications for lasers and light-emitting diodes 

      Najafi, A.; Tarasek, S.; Delikanlı, Savaş; Zhang, P.; Norden, T.; Shendre, S.; Sharma, Manoj; Bhattacharya, A.; Taghipour, Nima; Pientka, J.; Dedmir, Hilmi Volkan; Thomay, T. (American Chemical Society, 2020-03)
      We utilized time-resolved photoluminescence (TRPL) spectroscopy to study the excitonic circular polarization (PX) from CdSe/CdMnS core/shell nanoplatelets (NPLs) with a bilayer core. This allows an extensive study of the ...

    • Coreless fiber‐based whispering‐gallery‐mode assisted lasing from colloidal quantum well solids 

      Sak, Mustafa; Taghipour, Nima; Delikanlı, Savaş; Shendre, S.; Tanrıöver, İbrahim; Gao, Y.; Yu, J.; Yanyan, Z.; Yoo, S.; Dang, C.; Demir, Hilmi Volkan; Foroutan, Sina (Wiley-VCH Verlag, 2020-01)
      Whispering gallery mode (WGM) resonators are shown to hold great promise to achieve high‐performance lasing using colloidal semiconductor nanocrystals (NCs) in solution phase. However, the low packing density of such ...

    • Electrically control amplified spontaneous emission in colloidal quantum dots 

      Yu, J.; Shendre, S.; Koh, W.; Liu, B.; Li, M.; Hou, S.; Hettiarachchi, C.; Delikanlı, S.; Hernandez-Martinez, P.; Birowosuto, M. D.; Wang, H.; Sum, T.; Demir, Hilmi Volkan; Dang, C. (American Association for the Advancement of Science, 2019)
      Colloidal quantum dots (CQDs) are highly promising materials for light amplification thanks to their efficient photoluminescence, tunable emission wavelength and low-cost synthesis. Unfortunately, CQDs are suffering from ...

    • Exciton dynamics in colloidal quantum-dot LEDs under active device operations 

      Shendre, S.; Sharma, V. K.; Dang C.; Demir, Hilmi Volkan (American Chemical Society, 2018)
      Colloidal quantum-dot light-emitting diodes (QLEDs) are lucrative options for color-pure lighting sources. To achieve high-performance QLEDs, besides developing high-efficiency quantum dots (QDs), it is essential to ...

    • High brightness formamidinium lead bromide perovskite nanocrystal light emitting devices 

      Perumal, A.; Shendre, S.; Li, M.; Tay, Y. K. E.; Sharma, V. K.; Chen, S.; Wei, Z.; Liu, Q.; Gao, Y.; Buenconsejo, P. J. S.; Tan S.T.; Gan, C. L.; Xiong, Q.; Sum, T. C.; Demir, Hilmi Volkan (Nature Publishing Group, 2016)
      Formamidinium lead halide (FAPbX3) has attracted greater attention and is more prominent recently in photovoltaic devices due to its broad absorption and higher thermal stability in comparison to more popular methylammonium ...

    • Light-Emitting diodes with Cu-Doped colloidal quantum wells: from ultrapure green, tunable dual-emission to white light 

      Liu, B.; Sharma, Manoj; Yu, J.; Shendre, S.; Hettiarachchi, C.; Sharma, Ashma; Yeltik, Aydan; Wang, L.; Sun, H.; Dang, C.; Demir, Hilmi Volkan (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)
      Copper‐doped colloidal quantum wells (Cu‐CQWs) are considered a new class of optoelectronic materials. To date, the electroluminescence (EL) property of Cu‐CQWs has not been revealed. Additionally, it is desirable to achieve ...

    • Magneto-optics of excitons interacting with magnetic ions in CdSe/CdMnS colloidal nanoplatelets 

      Shornikova, E. V.; Yakovlev, D. R.; Tolmachev, D. O.; Ivanov, V. Y.; Kalitukha, I. V.; Sapega, V. F.; Kudlacik, D.; Kusrayev, Y. G.; Golovatenko, A. A.; Shendre, S.; Delikanlı, Savaş; Demir, Hilmi Volkan; Bayer, M. (American Chemical Society, 2020-06)
      Excitons in diluted magnetic semiconductors represent excellent probes for studying the magnetic properties of these materials. Various magneto-optical effects, which depend sensitively on the exchange interaction of the ...

    • On-chip mercury-free deep-uv light-emitting sources with ultrahigh germicidal efficiency 

      Sharma, Vijay Kumar; Tan, S. T.; Haiyang, Z.; Shendre, S.; Baum, A.; Chalvet, F.; Tirén, J.; Demir, Hilmi Volkan (Wiley-VCH Verlag GmbH & Co. KGaA, 2021-08-04)
      In the current COVID-19 scenario, there is an urgent need for developing efficient and mercury-free deep-ultraviolet (deep-UV) light sources for disinfection applications. AlGaN-based light-emitting diodes (LEDs) may be ...

    • Optically detected magnetic resonance in CdSe/CdMnS nanoplatelets 

      Tolmachev, D. O.; Ivanov, V. Y.; Yakovlev, D. R.; Shornikova, E. V.; Witkowski, B.; Shendre, S.; Işık, Furkan; Delikanlı, Savaş; Demir, Hilmi Volkan; Bayer, M. (Royal Society of Chemistry, 2020)
      Core/shell CdSe/(Cd,Mn)S colloidal nanoplatelets containing magnetic Mn2+ ions are investigated by the optically detected magnetic resonance technique, combining 60 GHz microwave excitation and photoluminescence detection. ...

    • Record high external quantum efficiency of 19.2% achieved in light-emitting diodes of colloidal quantum wells enabled by hot-Injection shell growth 

      Liu, B.; Altıntaş, Yemliha; Wang, L.; Shendre, S.; Sharma, Manoj; Sun, H.; Mutlugün, Evren; Demir, Hilmi Volkan (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2020)
      Colloidal quantum wells (CQWs) are regarded as a highly promising class of optoelectronic materials, thanks to their unique excitonic characteristics of high extinction coefficients and ultranarrow emission bandwidths. ...

    • Room-temperature lasing in colloidal nanoplatelets via mie-resonant bound states in the continuum 

      Wu, M.; Ha, S. T.; Shendre, S.; Durmuşoğlu, E. G.; Koh, W.-K.; Abujetas, D. R.; Sanchez-Gil, J. A.; Paniagua-Domínguez, R.; Demir, Hilmi Volkan; Kuznetsov, A. I. (American Chemical Society, 2020)
      Solid-state room-temperature lasing with tunability in a wide range of wavelengths is desirable for many applications. To achieve this, besides an efficient gain material with a tunable emission wavelength, a high ...

    • Sub-single exciton optical gain threshold in colloidal semiconductor quantum wells with gradient alloy shelling 

      Taghipour, Nima; Delikanlı, Savaş; Shendre, S.; Sak, Mustafa; Li, M.; Işık, Furkan; Tanrıöver, İbrahim; Güzeltürk, B.; Sum, T. C.; Demir, Hilmi Volkan (Nature Research, 2020)
      Colloidal semiconductor quantum wells have emerged as a promising material platform for use in solution-processable lasers. However, applications relying on their optical gain suffer from nonradiative Auger decay due to ...

    • Temperature-dependent optoelectronic properties of quasi-2D colloidal cadmium selenide nanoplatelets 

      Bose, S.; Shendre, S.; Song, Z.; Sharma, V. K.; Zhang, D. H.; Dang C.; Fan, W.; Demir, Hilmi Volkan (Royal Society of Chemistry, 2017)
      Colloidal cadmium selenide (CdSe) nanoplatelets (NPLs) are a recently developed class of efficient luminescent nanomaterials suitable for optoelectronic device applications. A change in temperature greatly affects their ...

    • Ultrahigh-efficiency aqueous flat nanocrystals of CdSe/CdS@Cd1−xZnxS colloidal core/crown@alloyed-shell quantum wells 

      Shendre, S.; Delikanlı, Savaş; Li, M.; Dede, Didem; Pan, Z.; Ha, S. T.; Fu, Y. H.; Hernández-Martínez, Pedro L.; Yu, J.; Erdem, Onur; Kuznetsov, A. I.; Dang, C.; Sum, T. C.; Demir, Hilmi Volkan (Royal Society of Chemistry, 2019)
      Colloidal semiconductor nanoplatelets (NPLs) are highly promising luminescent materials owing to their exceptionally narrow emission spectra. While high-efficiency NPLs in non-polar organic media can be obtained readily, ...

    • Ultrathin highly luminescent two-monolayer colloidal CdSe nanoplatelets 

      Delikanlı, Savaş; Yu, G.; Yeltik, Aydan; Bose, S.; Erdem, Talha; Yu, J.; Erdem, Onur; Sharma, Manoj; Sharma, Vijay Kumar; Quliyeva, Ulviyya; Shendre, S.; Dang, C.; Zhang, D.; Sum, T.; Fan, W.; Demir, Hilmi Volkan (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)
      Surface effects in atomically flat colloidal CdSe nanoplatelets (NLPs) are significantly and increasingly important with their thickness being reduced to subnanometer level, generating strong surface related deep trap ...