TY - JOUR
T1 - Perturbation-Induced Seeding and Crystallization of Hybrid Perovskites over Surface-Modified Substrates for Optoelectronic Devices
AU - Ahmad, Riyas
AU - Surendran, Abhijith
AU - Harikesh, P. C.
AU - Haselsberger, Reinhard
AU - Jamaludin, Nur Fadilah
AU - John, Rohit Abraham
AU - Koh, Teck Ming
AU - Bruno, Annalisa
AU - Leong, Wei Lin
AU - Mathews, Nripan
AU - Michel-Beyerle, Maria Elisabeth
AU - Mhaisalkar, Subodh G.
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/8/7
Y1 - 2019/8/7
N2 - Growing a monocrystalline layer of lead halide perovskites directly over substrates is necessary to completely harness their stellar properties in optoelectronic devices, as the single crystals of these materials are extremely brittle. We study the crystallization mechanism of perovskites by antisolvent vapor diffusion to its precursor solution and find that heterogeneous nucleation prevails in the process, with the crystallization dish walls providing the energy to overcome the nucleation barrier. By perturbing the system using sonication, we are able to introduce homogeneously nucleated seed crystals in the precursor solution. These seeds lead to the growth of closely packed crystals over surface-modified substrates kept in the precursor solution. This crystallization process is substrate independent and scalable and can be utilized to fabricate planar optoelectronic devices. We demonstrate a methylammonium lead iodide planar crystal photoconductor with a colossal detectivity of 1.48 × 1013 Jones.
AB - Growing a monocrystalline layer of lead halide perovskites directly over substrates is necessary to completely harness their stellar properties in optoelectronic devices, as the single crystals of these materials are extremely brittle. We study the crystallization mechanism of perovskites by antisolvent vapor diffusion to its precursor solution and find that heterogeneous nucleation prevails in the process, with the crystallization dish walls providing the energy to overcome the nucleation barrier. By perturbing the system using sonication, we are able to introduce homogeneously nucleated seed crystals in the precursor solution. These seeds lead to the growth of closely packed crystals over surface-modified substrates kept in the precursor solution. This crystallization process is substrate independent and scalable and can be utilized to fabricate planar optoelectronic devices. We demonstrate a methylammonium lead iodide planar crystal photoconductor with a colossal detectivity of 1.48 × 1013 Jones.
KW - antisolvent vapor crystallization
KW - crystal growth
KW - lead halide perovskites
KW - photodetectors
KW - precursor colloids
UR - http://www.scopus.com/inward/record.url?scp=85070565501&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070565501&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b05965
DO - 10.1021/acsami.9b05965
M3 - Article
C2 - 31304736
AN - SCOPUS:85070565501
SN - 1944-8244
VL - 11
SP - 27727
EP - 27734
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 31
ER -