All-inorganic cesium lead halide perovskite nanocrystals for photodetector applications.

Herein, we describe simple, fast and reproducible halide ion exchange reactions in CsPbX3 (X = Cl, Br, I) nanocrystals (NCs) at room temperature. Through the simple adjustment of the halide ion concentration, the photoluminescence of these NCs can be tuned over the entire visible region (425-655 nm). Photodetector devices based on entirely inorganic CsPbI3 NCs are demonstrated for the first time. The photodetectors exhibited a good on/off photocurrent ratio of 10(5).

[1]  Edward H. Sargent,et al.  Sensitive, Fast, and Stable Perovskite Photodetectors Exploiting Interface Engineering , 2015 .

[2]  Felix Deschler,et al.  Bright light-emitting diodes based on organometal halide perovskite. , 2014, Nature nanotechnology.

[3]  H. Zeng,et al.  All‐Inorganic Colloidal Perovskite Quantum Dots: A New Class of Lasing Materials with Favorable Characteristics , 2015, Advanced materials.

[4]  J. Barber,et al.  Perovskite-Hematite Tandem Cells for Efficient Overall Solar Driven Water Splitting. , 2015, Nano letters.

[5]  M. Fiebig,et al.  Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites , 2015, Nature Communications.

[6]  Peidong Yang,et al.  Nanowire ultraviolet photodetectors and optical switches , 2002 .

[7]  Sang Il Seok,et al.  High-performance photovoltaic perovskite layers fabricated through intramolecular exchange , 2015, Science.

[8]  Liberato Manna,et al.  Tuning the Optical Properties of Cesium Lead Halide Perovskite Nanocrystals by Anion Exchange Reactions , 2015, Journal of the American Chemical Society.

[9]  A. Masaki,et al.  Strongly Enhanced Free-Exciton Luminescence in Microcrystalline CsPbBr3 Films , 2003 .

[10]  M. Green,et al.  The emergence of perovskite solar cells , 2014, Nature Photonics.

[11]  Kidong Park,et al.  Reversible Halide Exchange Reaction of Organometal Trihalide Perovskite Colloidal Nanocrystals for Full-Range Band Gap Tuning. , 2015, Nano letters.

[12]  Zhifu Liu,et al.  Crystal Growth of the Perovskite Semiconductor CsPbBr3: A New Material for High-Energy Radiation Detection , 2013 .

[13]  M. Kovalenko,et al.  Fast Anion-Exchange in Highly Luminescent Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I) , 2015, Nano letters.

[14]  Nam-Gyu Park,et al.  Highly Reproducible Perovskite Solar Cells with Average Efficiency of 18.3% and Best Efficiency of 19.7% Fabricated via Lewis Base Adduct of Lead(II) Iodide. , 2015, Journal of the American Chemical Society.

[15]  M. Kanatzidis,et al.  All-solid-state dye-sensitized solar cells with high efficiency , 2012, Nature.

[16]  Christopher H. Hendon,et al.  Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, and I): Novel Optoelectronic Materials Showing Bright Emission with Wide Color Gamut , 2015, Nano letters.

[17]  Hao Li,et al.  CsSnI3: Semiconductor or metal? High electrical conductivity and strong near-infrared photoluminescence from a single material. High hole mobility and phase-transitions. , 2012, Journal of the American Chemical Society.

[18]  Mohammad Khaja Nazeeruddin,et al.  Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts , 2014, Science.

[19]  David Cahen,et al.  How Important Is the Organic Part of Lead Halide Perovskite Photovoltaic Cells? Efficient CsPbBr3 Cells. , 2015, The journal of physical chemistry letters.

[20]  H. Zeng,et al.  Quantum Dot Light‐Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3) , 2015, Advanced materials.

[21]  Yang Yang,et al.  Solution-processed hybrid perovskite photodetectors with high detectivity , 2014, Nature Communications.

[22]  Dawei Di,et al.  Efficient light-emitting diodes based on nanocrystalline perovskite in a dielectric polymer matrix. , 2015, Nano letters.