Page 183 - Multifunctional Photocatalytic Materials for Energy

Metal-based semiconductor nanomaterials for thin-film solar cells 169

Fig. 8.13 Photovoltaic performance and photostability tests of PSCs: (A) Cross-sectional
SEM image of a typical PSC based on LBSO (scale bar, 500 nm). (B) I-V curves of the best-
performing LBSO- and TiO 2 -based PSC, respectively. Insets are corresponding stabilized
PCEs at a maximum power point (LBSO: 0.96 V; TiO 2 : 0.91 V). (C) Photostability tests
under constant AM 1.5G illumination with an xenon lamp, including UV radiation for two
unencapsulated and encapsulated devices, respectively.
Reprinted with permission from S.S. Shin et al., Colloidally prepared La-doped BaSnO 3
electrodes for efficient, photostable perovskite solar cells. Science 356 (2017) 167. Copyright
2017, American Association for the Advancement of Science, AAAS.

the first time a low-temperature superoxide colloidal solution route (<300°C) for pre-
paring an LBSO electrode. The PSCs based on LBSO and methylammonium lead
iodide (MAPbI 3 ) showed a steady-state PCE of 21.2%, which was much better than
that based on a mesoporous TiO 2 device [57]. In addition, the LBSO-based PSCs
were able to retain 93% of their initial performance after 1000 h of full-sun illumina-
tion, whereas the TiO 2 -based PSCs completely degraded within 500 h (as shown in
Fig. 8.13). The introduction of the n-type LBSO ETM will promote the development
of long-term stability PSCs under UV irradiation.