Fig. 1: Controlling lattice expansion via Sn-I bond strengthening. | Nature Communications

Fig. 1: Controlling lattice expansion via Sn-I bond strengthening.

From: Lattice stabilization and strain homogenization in Sn-Pb bottom subcells enable stable all-perovskite tandems solar cells

Fig. 1

a Chemical structures of SDS, SBS, NSA, NDS and NTS. b–d Raman spectra of the control, SDS and NTS modified films. e–g Pseudo-color maps of temperature-dependent photoluminescence (TD-PL) spectra for the control, with SDS, and with NTS films across a temperature range of 100–190 K. h Temperature dependence of the full width at half maximum (FWHM) of PL peaks for the respective films. i, j Schematic representations of lattice distortions under AIMD simulations at 10 ps for the control and films incorporating NTS. k, l Computational results for bond angle variance (BAV) and distortion index (DI) to quantify lattice distortions. m, n Photoluminescence (PL) spectra of the control and films modified with NTS under different aging conditions (0–50 h of continuous light exposure).

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