Photodiode Response in a CH3NH3PbI3/CH3NH3SnI3 Heterojunction

Here we report another surprising feature of the methylammonium metal halide material family, the phototunability of the diode response of a heterojunction made of CH3NH3PbI3 and its close relative, CH3NH3SnI3. In the dark state the device behaves as a diode, with the Sn homologue acting as the "p" side. The junction is extremely sensitive to illumination. A complete reversal of the diode polarity, the first observation of its kind, is seen when the junction is exposed to red laser light of 25 mW/cm(2) or larger power density. This finding opens up the possibility for a novel class of optoelectronic devices.


Published in:
Acs Applied Materials & Interfaces, 9, 11, 10198-10202
Year:
2017
Publisher:
Washington, Amer Chemical Soc
ISSN:
1944-8244
Keywords:
Laboratories:




 Record created 2017-05-01, last modified 2018-03-17


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