Table 2 Isotope shifts and thermal hysteresis measurements for structural phase transitions of MAPbI3.

From: Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide

Sample

Structural Transition

Transition Temperature (K) (heating)

Transition Temperature (K) (cooling)

Hysteresis (K)

CD3ND3PbI3a

Pm-3m → I4/mcm

330

315

15

I4/mcm → Pnma

172

163

9

CD3ND3PbI3b

Pm-3m → I4/mcm

332

332

0

I4/mcm → Pnma

—

160–165

—

CH3ND3PbI3a

Pm-3m → I4/mcm

335

325

10

I4/mcm → Pnma

169

162

7

CH3NH3PbI3b

Pm-3m → I4/mcm

338

338

0

I4/mcm → Pnma

—

160–165

—

  1. aDetermined from neutron powder diffraction data. Heating and cooling rates were 1 K/min.
  2. bDetermined from synchrotron X-ray powder diffraction data. Temperatures were equilibrated for approximately 10 minutes after 1 K changes.
Back to article page