TY - JOUR
T1 - Photoresponse of CsPbBr3 and Cs4PbBr6 perovskite single crystals
AU - Cha, Ji-Hyun
AU - Han, Jae Hoon
AU - Yin, Wenping
AU - Park, Cheolwoo
AU - Park, Yongmin
AU - Ahn, Tae Kyu
AU - Cho, Jeong Ho
AU - Jung, Duk-Young
PY - 2017/2/2
Y1 - 2017/2/2
N2 - High-quality and millimeter-sized perovskite single crystals of CsPbBr3 and Cs4PbBr6 were prepared in organic solvents and studied for correlation between photocurrent generation and photoluminescence (PL) emission. The CsPbBr3 crystals, which have a 3D perovskite structure, showed a highly sensitive photoresponse and poor PL signal. In contrast, Cs4PbBr6 crystals, which have a 0D perovskite structure, exhibited more than 1 order of magnitude higher PL intensity than CsPbBr3, which generated an ultralow photoresponse under illumination. Their contrasting optoelectrical characteristics were attributed to different exciton binding energies, induced by coordination geometry of the [PbBr6]4- octahedron sublattices. This work correlated the local structures of lead in the primitive perovskite and its derivatives to PL spectra as well as photoconductivity.
AB - High-quality and millimeter-sized perovskite single crystals of CsPbBr3 and Cs4PbBr6 were prepared in organic solvents and studied for correlation between photocurrent generation and photoluminescence (PL) emission. The CsPbBr3 crystals, which have a 3D perovskite structure, showed a highly sensitive photoresponse and poor PL signal. In contrast, Cs4PbBr6 crystals, which have a 0D perovskite structure, exhibited more than 1 order of magnitude higher PL intensity than CsPbBr3, which generated an ultralow photoresponse under illumination. Their contrasting optoelectrical characteristics were attributed to different exciton binding energies, induced by coordination geometry of the [PbBr6]4- octahedron sublattices. This work correlated the local structures of lead in the primitive perovskite and its derivatives to PL spectra as well as photoconductivity.
UR - http://www.scopus.com/inward/record.url?scp=85011361646&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.6b02763
DO - 10.1021/acs.jpclett.6b02763
M3 - Article
C2 - 28067051
AN - SCOPUS:85011361646
SN - 1948-7185
VL - 8
SP - 565
EP - 570
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 3
ER -