Session T23: Semiconductors: Thermodynamic & Transport Properties (Experimental)

8:00 AM–11:12 AM, Thursday, March 21, 2013
Room: 325

Sponsoring Unit: FIAP
Chair: Ernesto Marinero, Hitachi Global

Abstract ID: BAPS.2013.MAR.T23.16

Abstract: T23.00016 : Scanning probe microscopy measurements of charge in PbS quantum dot (sub)monolayers

11:00 AM–11:12 AM

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  Jason P. Moscatello
    (Mount Holyoke College)

  Pawana Shrestha
    (Mount Holyoke College)

  Qinxia Wang
    (Mount Holyoke College)

  Katherine E. Aidala
    (Mount Holyoke College)

Nanocrystal quantum dots (NQDs) are of intense interest because their optical and electronic properties can be tuned by altering the dot size and material. Transport in arrays of NQDs is generally dominated by disorder, and strongly influenced by the immediate environment. Fully understanding transport through arrays of NQDs would allow the design of improved devices, such as LEDs, photodetectors and lasers. The goal of our study is to use electrostatic force microscopy techniques to study charge transport in (sub)monolayers of NQDs. These 2D PbS NQD arrays are achieved by spin-coating the NQDs between lithographically patterned electrodes, and the measurements take place in a custom-built nitrogen environment cell for our AFM.

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