Journal
SCIENCE
Volume 310, Issue 5745, Pages 86-89Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1116703
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Initially poorly conducting PbSe nanocrystal solids (quantum dot arrays or superlattices) can be chemically activated to fabricate n- and p-channel field effect transistors with electron and hole mobilities of 0.9 and 0.2 square centimeters per volt-second, respectively; with current modulations of about 10(3) to 10(4); and with current density approaching 3x10(4) amperes per square centimeter. Chemical treatments engineer the interparticle spacing, electronic coupling, and doping while passivating electronic traps. These nanocrystal field-effect transistors allow reversible switching between n- and p-transport, providing options for complementary metal oxide semiconductor circuits and enabling a range of low-cost, large-area electronic, optoelectronic, thermoelectric, and sensing applications.
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