TY - JOUR
T1 - Formation and encapsulation of all-inorganic lead halide perovskites at room temperature in metal-organic frameworks
AU - Cha, Ji-Hyun
AU - Noh, Kyungkyou
AU - Yin, Wenping
AU - Lee, Yongju
AU - Park, Yongmin
AU - Ahn, Tae Kyu
AU - Mayoral, Alvaro
AU - Kim, Jaheon
AU - Jung, Duk-Young
AU - Terasaki, Osamu
PY - 2019/5/2
Y1 - 2019/5/2
N2 - Improving the stability and tuning the optical properties of semiconducting perovskites are vital for their applications in advanced optoelectronic devices. We present a facile synthetic method for hybrid composites of perovskites and metal-organic frameworks (MOFs). A simple two-step solution-based method without organic surfactants was employed to make all-inorganic lead-halide perovskites (CsPbX3; X = Cl, Br, I, or mixed halide compositions) form directly in the pores of MIL-101 MOF. That is, a polar organic solution of lead halide (PbX2) was impregnated into the MOF pores to give PbX2@MIL-101, which was then subjected to a perovskite-formation reaction with cesium halide (CsX) dissolved in methanol. The compositions of the halogen anions in the perovskites can be modulated with various halide precursors, leading to CsPbX3@MIL-101 composites with X3 = Cl3, Cl2Br, Br2Cl, Br3, Br2I, I2Br, and I3 that exhibit gradual variation of band gap energies and tuned emission wavelengths from 417 to 698 nm.
AB - Improving the stability and tuning the optical properties of semiconducting perovskites are vital for their applications in advanced optoelectronic devices. We present a facile synthetic method for hybrid composites of perovskites and metal-organic frameworks (MOFs). A simple two-step solution-based method without organic surfactants was employed to make all-inorganic lead-halide perovskites (CsPbX3; X = Cl, Br, I, or mixed halide compositions) form directly in the pores of MIL-101 MOF. That is, a polar organic solution of lead halide (PbX2) was impregnated into the MOF pores to give PbX2@MIL-101, which was then subjected to a perovskite-formation reaction with cesium halide (CsX) dissolved in methanol. The compositions of the halogen anions in the perovskites can be modulated with various halide precursors, leading to CsPbX3@MIL-101 composites with X3 = Cl3, Cl2Br, Br2Cl, Br3, Br2I, I2Br, and I3 that exhibit gradual variation of band gap energies and tuned emission wavelengths from 417 to 698 nm.
UR - http://www.scopus.com/inward/record.url?scp=85065187522&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.9b00510
DO - 10.1021/acs.jpclett.9b00510
M3 - Article
C2 - 31002525
AN - SCOPUS:85065187522
SN - 1948-7185
VL - 10
SP - 2270
EP - 2277
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 9
ER -