Unknown

Dataset Information

0

Contactless measurements of photocarrier transport properties in perovskite single crystals.


ABSTRACT: The remarkable properties of metal halide perovskites arising from their impressive charge carrier diffusion lengths have led to rapid advances in solution-processed optoelectronics. Unfortunately, diffusion lengths reported in perovskite single crystals have ranged widely - from 3 μm to 3 mm - for ostensibly similar materials. Here we report a contactless method to measure the carrier mobility and further extract the diffusion length: our approach avoids both the effects of contact resistance and those of high electric field. We vary the density of quenchers - epitaxially included within perovskite single crystals - and report the dependence of excited state lifetime in the perovskite on inter-quencher spacing. Our results are repeatable and self-consistent (i.e. they agree on diffusion length for many different quencher concentrations) to within ± 6%. Using this method, we obtain a diffusion length in metal-halide perovskites of 2.6 μm ± 0.1 μm.

SUBMITTER: Gong X 

PROVIDER: S-EPMC6453944 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4673501 | biostudies-literature
| S-EPMC4895388 | biostudies-literature
| S-EPMC7918564 | biostudies-literature
| S-EPMC6936098 | biostudies-literature
| S-EPMC7059302 | biostudies-literature
| S-EPMC8162942 | biostudies-literature
| S-EPMC8641924 | biostudies-literature
| S-EPMC7966356 | biostudies-literature
| S-EPMC6775060 | biostudies-literature
| S-EPMC4595799 | biostudies-other