Publications

69.
  • M Ng, P Geng, SB Shivarudraiah, L Guo*, JE Halpert*; Synthesis of Cesium Copper Bromide Nanorods with Strong Linearly Polarized Emission, Advanced Optical Materials , 2022, ASAP.
68.
  • Y Li, Z Zhou, Z Xing, KS Wong, HHY Sung, ID Williams, JE Halpert; Highly stable tetrahydrothiophene 1-oxide caged copper bromide and chloride clusters with deep-red to near-IR emission, Inorganic Chemistry , 2022, 61 (28), 10950-10956.
67.
  • M Ng, SB Shivarudraiah, JE Halpert; Polarization anisotropy losses due to morphological instability in CsPbX3 nanorods and strategies for mitigation, , The Journal of Materials Chemistry C, 2022, 10, 8947-8954.
66.
  • C Kang, Z Zhou, JE Halpert*, AK Srivastava*; Inkjet Printed Patterned Bank Structure with Encapsulated Perovskite Colour Filters for Modern Display, , Nanoscale , 2022, 14, 8060-8068.
65.
  • N. Tewari, D. Lam, C.H.A. Li, J.E. Halpert*; Recent advancements in batteries and photo-batteries using metal halide perovskites, , APL Materials , 2022, 10, 040905.
64.
  • K. Mallem, M.F. Prodanov, C. Dezhang, M. Marus, C. Kang, S.B. Shivarudraiah, V.V. Vashchenko, J.E. Halpert, A.K. Srivastava*; Solution-Processed Red, Green, and Blue Quantum Rod Light-Emitting Diodes, ACS Applied Materials & Interfaces , 2022, ASAP.
63.
  • Y. Yu, H. Xing, Z. Zhou, J. Liu, H. Sung, I. Williams, J.E. Halpert*, Z. Zhao*, B.Z. Tang*; How Do Molecular Interactions Affect Fluorescence Behavior of AIEgens in Solution and Aggregate States?, SCIENCE CHINA Chemistry , 2022, ASAP.
62.
  • D. Chen, S.B. Shivarudraiah, P. Geng, M. Ng, C.-H. Angus Li, N. Tewari, X. Zou, K.S. Wong, L. Guo, J.E. Halpert*, Solution-Processed, Inverted AgBiS2 Nanocrystal Solar Cells, ACS Applied Materials & Interfaces , 2022, 14, 1, 1634–1642.
61.
  • Y. Li; Z. Zhou; F.K. Sheong; Z. Xing; R. Lortz; K.S. Wong; H. Sung; I.D. Williams; J.E. Halpert*; Tuning the self-trapped emission: reversible transformation to 0D copper clusters permits bright red emission in potassium and rubidium copper bromides, ACS Energy Letters , 2021, 6, 4383–4389.
60.
  • N. Tewari, S.B. Shivarudraiah, J.E. Halpert*; Photorechargeable Lead-Free Perovskite Lithium-Ion Batteries Using Hexagonal Cs3Bi2I9 Nanosheets, Nano Letters, 2021, 21, 13, 5578–5585.
59.
  • Z. Zhou, Y. Li, Z. Xing, Z. Li, K.S. Wong, J.E. Halpert*; Potassium and Rubidium Copper Halide A2CuX3 (A=K, Rb, X=Cl,Br) Micro- and Nanocrystals with Near Unity Quantum Yields for White Light Applications, ACS Applied Nano Materials , 2021, 4, 12, 14188-14196.
58.
  • H. Fiedler, J. Schacht, L. Hammerschmidt, V. Golovko*, N. Gaston, J.E. Halpert*; Emergent Electronic Properties in Co-deposited Superatomic Clusters, the Journal of Chemical Physics , 2021, 155, 124309.
57.
  • C.-H.A. Li, P. Geng, S.B. Shivarudraiah, M. Ng, X.-F. Zhang, B. Xu, L. Guo, J.E. Halpert*; The Multiple Roles of Metal Ion Dopants in Spectrally Stable, Efficient Quasi‐2D Perovskite Sky‐Blue Light‐Emitting Devices Advanced Optical Materials , 2021, 2100860.
56.
  • S.B. Shivarudraiah, N. Tewari, M. Ng, C.-H.A. Li, J.E. Halpert*; Optically Clear Films of Formamidinium Lead Bromide Perovskite for Wide-Band-Gap, Solution-Processed, Semi-transparent Solar Cells, ACS Applied Materials & Interfaces , 2021, 13, 31, 37223-37230.
55.
  • Z. Zhou, Y. Li, Z. Xing, H.H.Y. Sung, I.D. Williams, Z. Li, K.S. Wong, J. E. Halpert*; Rapid Synthesis of Bright, Shape-Controlled, Large Single Crystals of Cs3Cu2X5 for Phase Pure Single (X=Br, Cl) and Mixed Halides (X= Br/Cl) as the Blue and Green Components for Printable White LEDs, Advanced Materials Interfaces , 2021, 2101471.
54.
  • T. Zhang, Z. Zhou, Z. Zheng*, J. Zhang, Y. Yu, J.W.Y. Lam, J.E. Halpert*, B.Z. Tang*; “Simple” Aggregation-Induced Emission Luminogens for Non-doped Solution-Processed Organic Light-Emitting Diodes with Emission Close to Pure Red in the Standard Red, Green, and Blue Gamut, Advanced Photonics Research , 2021, 2 (6), 2100004.
53.
  • Y Li, Z Zhou, N Tewari, M Ng, P Geng, D Chen, PK Ko, M Qammar, L Guo, J.E. Halpert*; Progress in copper metal halides for optoelectronic applications, Materials Chemistry Frontiers , 2021, 5, 4796-4820. (invited review)
52.
  • C. Hu, S.B. Shivarudraiah, H.H.Y. Sung, I.D. Williams, J.E. Halpert*, S. Yang*; Discovery of a New Intermediate Enables One‐Step Deposition of High‐Quality Perovskite Films via Solvent Engineering,Solar RRL , 2021, 5 (4), 2000712.
51.
  • Y Li, P Vashishtha, Z Zhou, Z Li, SB Shivarudraiah, C Ma, J Liu, KS Wong, H Su, JE Halpert*; Room Temperature Synthesis of Stable, Printable Cs3Cu2X5 (X= I, Br/I, Br, Br/Cl, Cl) Colloidal Nanocrystals with Near Unity Quantum Yield Green Emitters (X= Cl), Chemistry of Materials, 2020, 32, 13, 5515–5524.
50.
  • P. Vashishtha*, S. Bishnoi, C.H.A. Li, M. Jagadeeswararao, T.J.N. Hooper, N. Lohia, S.B. Shivarudraiah, M.S. Ansari, S.N. Sharma*, J.E. Halpert*; Recent Advancements in Near-Infrared Perovskite Light-Emitting Diodes, ACS Applied Electronic Materials, 2020, 2 (11): 3470-3490.
49.
  • M.E. Cryer, L.A. Browning, N.O.V. Plank, J.E. Halpert*; Large Photogain in Multicolor Nanocrystal Photodetector Arrays Enabling Room-Temperature Detection of Targets Above 100 °C, ACS Photonics, 2020, 7 (11): 3078-3085.
48.
  • Y Li, P Vashishtha, Z Zhou, Z Li, SB Shivarudraiah, C Ma, J Liu, KS Wong, H Su, JE Halpert*; Room Temperature Synthesis of Stable, Printable Cs3Cu2X5 (X = I, Br/I, Br, Br/Cl, Cl) Colloidal Nanocrystals with Near-Unity Quantum Yield Green Emitters (X = Cl), Chemistry of Materials,, 2020, 32 (13): 5515-5524.
47.
  • S Shivarudraiah, M Ng, CHA Li, JE Halpert*; All-Inorganic, Solution-Processed, Inverted CsPbI3 Quantum Dot Solar Cells with a PCE of 13.1% Achieved via a Layer-by-Layer FAI Treatment, ACS Appl.Mater. interfaces,, 2020, 3 (6): 5620-5627.
46.
  • M Ng, JE Halpert*, Single crystals of mixed Br/Cl and Sn-doped Formamidinium Lead Halide Perovskites Via Inverse Temperature Crystallization, RSC Advances, 2020, 10 (7): 3832-3836.
45.
  • L Hu, Y Wang, SB Shivarudraiah, J Yuan, X Guan, X Geng, A Younis, Y Hu, S Huang, T Wu*, JE Halpert*, Quantum-Dot Tandem Solar Cells based on a Solution-Processed Nanoparticle Intermediate Layer, ACS Appl. Mater. Interfaces, , 2019, 12 (2): 2313-2318.
44.
  • AK Srivastava*, W Zhang, J Schneider, JE Halpert, AL Rogach*, Luminescent Down‐Conversion Semiconductor Quantum Dots and Aligned Quantum Rods for Liquid Crystal Displays, Advanced Science, 2019, 0 (0): 1901345.
43.
  • C-H Angus Li, Zhicong Zhou, Parth Vashishtha, Jonathan E. Halpert*; The Future is Blue (LEDs): Why Chemistry is the Key to Perovskite Displays, Chemistry of Materials, 2019, 31 (16): 6003-6032.
42.
  • Long Hu, Shujuang Huang*, Robert J. Patterson, Jonathan E. Halpert*; Enhanced mobility in PbS quantum dot films via PbSe quantum dot mixing for optoelectronic applications, J. Mater. Chem. C, 2019, 7: 4497-4502.
41.
  • Parth Vashishtha, Michael Ng, Sunil B. Shivarudraiah, Jonathan E. Halpert*; High Efficiency Blue and Green LEDs Using Ruddlesden-Popper Inorganic Mixed Halide Perovskites with Butylammonium Interlayers, Chemistry of Materials, 2019, 31, 83−89.
40.
  • Ronnie R. Tamming, Justinas Butkus, Michael B. Price, Parth Vashishtha, Shyamal K. K. Prasad, Jonathan E. Halpert, Kai Chen, Justin M. Hodgkiss* ; Ultrafast Spectrally Resolved Photoinduced Complex Refractive Index Changes in CsPbBr3 Perovskites, ACS Photonics, 2019, 6 (2): 345–350.
39.
  • Matthew E. Cryer, Jonathan E. Halpert*; Room Temperature MIR Detection through Localized Surface Vibrational States of SnTe Nanocrystals, ACS Sensors, 2018, 3 (10): 2087-2094.
38.
  • Long Hu, Zhilong Zhang, Robert J. Patterson, Sunil B Shivarudraiah, Zhicong Zhou, Michael Ng, Shujuang Huang*, Jonathan E. Halpert*; PbSe quantum dot passivated via mixed halide perovskite nanocrystals for solar cells with over 9% efficiency, Solar RRL, 2018, 2, 1800234.
37.
  • Matthew E. Cryer, Jonathan E. Halpert*; 300 nm Spectral Resolution in the Mid-Infrared with Robust, High Responsivity Flexible Colloidal Quantum Dot Devices at Room Temperature, ACS Photonics, 2018, 5: 3009-3015.
36.
  • Matthew E. Cryer, Holger Fiedler, Jonathan E. Halpert*; A Photo-Electro-sensitive Memristor Using Oxygen Doping in HgTe Nanocrystal Films, ACS Appl. Mater. Interfaces, 2018, 10 (22): 18927-18934.
35.
  • Parth Vashishtha, Dani Z. Metin, Matthew E. Cryer, Kai Chen, Justin M Hodgkiss, Nicola Gaston, Jonathan E. Halpert*; Shape-, Size- and Composition-Controlled Thallium Lead Halide Perovskite Nanowires and Nanocrystals with Tuneable Band Gaps, Chemistry of Materials, 2018, 30 (9): 2973-2982.
34.
  • Vashishtha P, Halpert JE*; Field Driven Ion Migration and Color Instability in Red Emitting Mixed Halide Perovskite Nanocrystal LEDs, Chemistry of Materials, 2017, 29 (14): 5965–5973.
33. Ma Y, Vashishtha P Chen K, Peach EL, Ohayon D, Hodgkiss JM, Halpert JE*; Controlled Growth of CH3NH3PbI3 Using a Dynamically Dispensed Spin‐Coating Method: Improving Efficiency with a Reproducible PbI2 Blocking Layer, ChemSusChem, 2017, 10 (12): 2677-2684.
 
32.
  • Butkus J, Vashishtha P, Chen K, Gallaher JK, Prasad SKK, Metin DZ, Laufersky G, Gaston N, Halpert JE*, Hodgkiss JM*; The Evolution of Quantum Confinement in CsPbBr3 Perovskite Nanocrystals, Chemistry of Materials., 2017, 29 (8): 3644-3652.
31. McGrath AJ, Yu C, Fiedler H, Butkus J, Hodgkiss JM, Halpert JE*; Dual-Functional Optoelectronic and Magnetic Pyrite/Iron Selenide Core/Shell Nanocrystals, J. Phys. Chem. C, 2017, 121 (14): 8220–8226.
30.
  • Ma Y, Vashishtha P, Shivarudraiah SB, Chen K, Liu Y, Hodgkiss JM, Halpert JE*; A Hybrid Perovskite Solar Cell Modified with Copper Indium Sulfide Nanocrystals to Enhance Hole Transport and Moisture Stability, Solar RRL, 2017, 1 (8): 1700078.
29.
  • Price MB, J Butkus, TC Jellicoe, A Sadhanala, A Briane, JE Halpert, K Broch, JM Hodgkiss, RH Friend, F Deschler*; Hot-carrier Cooling and Photoinduced Refractive Index Changes in Organic-inorganic Lead Halide Perovskites, Nature Communications, 2015, 6: 8420.
28.
  • McVey B, Butkus J, Halpert JE, Hodgkiss JM, RD Tilley*; Solution Synthesis and Optical Properties of Doped Silicon Nanocrystals; J. Phys. Chem. Lett., 2015, 6 (9): 1573–1576.
27. Chen K†, Barker, AJ†, Morgan FLC, Halpert JE*, Hodgkiss JM*, The Effect of Carrier Thermalization Dynamics on Light Emission and Amplification in Organometal Halide Perovskites, J. Phys. Chem. Lett, 2015, 6: 153-158.


Earlier Work by JEH

26. Banger KK, Warwick C, Lang J, Broch K, Halpert JE, Socratous J, Brown A, Leedham T, H Sirringhaus*; Identification of Dipole Disorder in Low Temperature Solution Processed Oxides: Its Utility and Suppression for Transparent High Performance Solution-Processed Hybrid Electronics, Chem. Sci., 2016, 7 (10): 6337-6346.
25. Halpert JE†, Morgenstern FSF†, Ehrler B, Vaynzof Y, Credgington D, Greenham NC*; Charge Dynamics in Solution-Processed Nanocrystalline CuInS2 Solar Cells, ACS Nano, 2015, 9 (6): 5857–5867.
24.
  • Lai X, Halpert JE, Wang D*; Recent Advances in Micro-/Nano-structured Hollow Spheres for Energy Applications: From Simple to Complex Systems; Energy Environ. Sci., 2012, 5 (2): 5604-5618.
23.
  • Wang S, Yi L, Halpert JE, Liu Y, Lai X-Y, Cao H, Wang D *, Li Y *; A Novel and Highly Efficient Photocatalyst Based on P25–Graphdiyne Nanocomposite, Small, 2012, 8(2): 265–271.
22. Dong Z, Lai X, Halpert JE, Yang N, Yi L, Zhai J, Wang D*, Tang Z, Jiang L; Accurate Control of Multishelled ZnO Hollow Microspheres for Dye‐Sensitized Solar Cells with High Efficiency, Adv. Mater., 2012, 24(8): 1046-1049.
21.
  • Yang N, Zhang Y, Halpert JE, Zhai J, Wang D, Jiang L*; Granum-Like Stacking Structures with TiO2–Graphene Nanosheets for Improving Photoelectric Conversion, Small, 2012, 8(11):1762-70.
20.
  • Zhu R, Lai X, Halpert JE, Yu R, Wang D*; Hierarchical Hydroxyapatite Microspheres Composed of Nanorods and Their Competitive Sorption Behavior for Heavy Metal Ions, Euro. J. of Inorg. Chem., 2012, 16:  2665-2668.
19.
  • Cui Y, Lai X, Li L, Hu Z, Wang S, Halpert JE, Yu R, Wang D*; Water‐Soluble Monodispersed Lanthanide Oxide Submicrospheres: PVP‐Assisted Hydrothermal Synthesis, Size‐Control and Luminescence Properties, ChemPhysChem, 2012, 13 (10): 2610-2614.
18.
  • Du J, Lai X-Y, Halpert JE, Yang Y and Wang D*; Formation of Efficient Dye-Sensitized Solar Cells by Introducing an Interfacial Layer of Hierarchically Ordered Macro-Mesoporous TiO2 Film, Science China: Chemistry, 2011, 54 (6): 930–935.
17. Aidala KE, MJ Panzer, PO Anikeeva, JE Halpert, MG Bawendi, V Buloviç*; Morphology of Contact Printed Colloidal Quantum Dots in Organic Semiconductor Films: Implications for QD‐LEDs, Phys. Stat. Sol. C, 2011, 8: 120-3.
 
16.
  • Geyer S, Porter VJ, Halpert JE, Mentzel TS, Kastner MA, Bawendi MG*; Charge Transport in Mixed CdSe and CdTe Colloidal Nanocrystal Films, Phys. Rev. B, 2010, 82: 155201.
15.
  • Wood V, Panzer MJ, Caruge J-M, Halpert JE, Bawendi MG, Buloviç V*; Air-Stable Operation of Transparent, Colloidal Quantum Dot Based LEDs with a Unipolar Device Architecture, Nano Lett., 2010, 10 (1): 24-29.
 
14. Panzer MJ, Aidala KE, Anikeeva PO, Halpert JE, Bawendi MG, Buloviç V*; Nanoscale Morphology Revealed at the Interface Between Colloidal Quantum Dots and Organic Semiconductor Films, Nano Lett., 2010, 10: 2421–2426.
 
13.
  • Anikeeva PO†, Halpert JE†, Bawendi MG*, Buloviç V*; Quantum Dot Light-Emitting Devices with Electroluminescence Tunable over the Entire Visible Spectrum, Nano Lett., 2009, 9: 2532-2536. († these authors contributed equally
 
12.
  • Wood V†, Halpert JE†, Panzer MJ, Bawendi MG*, Bulovic V*; Alternating Current Driven Electroluminescence from ZnSe/ZnS:Mn/ZnS Nanocrystals, Nano Lett., 2009, 9: 2367-2371. († these authors contributed equally)
 
11.
  • Halpert JE, Tischler JR, Nair G, Walker BJ, Liu W, Bulovic V*, Bawendi MG*; Electrostatic Formation of Quantum Dot/J-aggregate FRET Pairs in Solution, J. Phys. Chem. C, 2009, 113: 9986–9992.
 
10. Wood V, Panzer MJ, Halpert JE, Caruge J-M, Bawendi M G, Bulovic V*; Selection of Metal Oxide Charge Transport Layers for Colloidal Quantum Dot LEDs, ACS Nano, 2009, 3: 3581-3586.
 
09. Wood V, Panzer MJ, Chen J, Bradley MS, Halpert JE, Bawendi MG, Bulovic V*; Inkjet-Printed Quantum Dot–Polymer Composites for Full-Color AC-Driven Displays, Adv. Mater., 2009, 21: 1-5.
 
08. Caruge JM†, Halpert JE†, Wood V†, Bulovic V*, Bawendi MG*; Colloidal Quantum-Dot Light-Emitting Diodes with Metal-Oxide Charge Transport Layers, Nature Photon., 2008, 2: 247-250. († these authors contributed equally)
 
07. Anikeeva PO, Madigan CF, Halpert JE, Bawendi MG, Bulovic V*; Electronic and Excitonic Processes in Light-Emitting Devices Based on Organic Materials and Colloidal Quantum Dots, Phys. Rev. B, 2008, 78: 085434.
 
06. Porter VJ, Geyer S, Halpert JE, Kastner MA, Bawendi MG*; Photoconduction in Annealed and Chemically Treated CdSe/ZnS Inorganic Nanocrystal Films, J. Phys. Chem. C, 2008, 112: 2308-2316.
 
05. Anikeeva PO†, Halpert JE†, Bawendi MG*, Bulovic V*; Electroluminescence from a Mixed Red-Green-Blue Colloidal Quantum Dot Monolayer, Nano Lett., 2007, 7(8): 2196-2200. († these authors contributed equally)
 
04. Halpert JE, Porter VJ, Zimmer JP, Bawendi MG*; Synthesis of CdSe/CdTe Nanobarbells, J. Amer. Chem. Soc., 2006, 128: 12590-12591.
 
03. Caruge J-M, Halpert JE, Bulovic V*, Bawendi MG*; NiO as an Inorganic Hole-Transporting Layer in Quantum-Dot Light-Emitting Devices, Nano Lett., 2006, 6: 2991-2994.
 
 
02. Steckel JS, Snee PT, Coe-Sullivan SA, Zimmer JP, Halpert JE, Anikeeva PO, Kim L-A, Bulovic V, Bawendi MG*; Color-Saturated Green-Emitting QD-LEDs, Angew. Chem. Int. Ed., 2006, 45: 5796-5799. 
 
01. Fisher B, Caruge JM, Chan YT, Halpert JE, Bawendi MG*; Multiexciton fluorescence from semiconductor nanocrystals, Chem. Phys., 2005, 318 (1), 71-81.