Publikationsdatum:
2014-10-24
Beschreibung:
We report the observation of self-doping in perovskite. CH 3 NH 3 PbI 3 was found to be either n- or p- doped by changing the ratio of methylammonium halide (MAI) and lead iodine (PbI 2 ) which are the two precursors for perovskite formation. MAI-rich and PbI 2 -rich perovskite films are p and n self-doped, respectively. Thermal annealing can convert the p -type perovskite to n -type by removing MAI. The carrier concentration varied as much as six orders of magnitude. A clear correlation between doping level and device performance was also observed.
Print ISSN:
0003-6951
Digitale ISSN:
1077-3118
Thema:
Physik
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