Perovskite ferroelectrics, in which the spontaneous polarization
(P
s) is conducive to the separation of
photoexcited charge carriers, have shown great potential for self-powered
photodetection. Nevertheless, such self-powered ferroelectric photodetectors
are mostly dominated by traditional inorganic oxides and exhibit relatively
small zero-bias photocurrent, which limit their further application.
Herein, we present a wide-bandgap 2D trilayered lead chloride hybrid
perovskite ferroelectric, EA4Pb3Cl10 (1, EA = ethylammonium), which shows a notable P
s of ∼4.5 μC/cm2 and
a high Curie temperature (415 K) beyond that of BaTiO3 (393
K). Significantly, benefiting from the wide bandgap of 3.39 eV, a
self-powered visible-blind ultraviolet (UV) photodetector has been
successfully realized, with a zero-bias photocurrent as high
as 18.6 μA/cm2, which is nearly 2 orders of magnitude
larger than those of mostly conventional inorganic ferroelectrics.
As a pioneering study, this work offers an efficient approach for
exploring wide-bandgap perovskite ferroelectrics and will excavate
their application in the field of self-powered visible-blind UV photodetection.
Cu2ZnSnS4is considered as the ideal absorption layer material in next generation thin film solar cells due to the abundant component elements in the crust being nontoxic and environmentally friendly. This paper summerized the development situation of Cu2ZnSnS4thin film solar cells and the manufacturing technologies, as well as problems in the manufacturing process. The difficulties for the raw material’s preparation, the manufacturing process, and the manufacturing equipment were illustrated and discussed. At last, the development prospect of Cu2ZnSnS4thin film solar cells was commented.
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