Amplified spontaneous emission in phenylethylammonium methylammonium lead iodide quasi-2D perovskites

Matthew R. Leyden, Toshinori Matsushima, Chuanjiang Qin, Shibin Ruan, Hao Ye, Chihaya Adachi

研究成果: Contribution to journalArticle

9 引用 (Scopus)

抜粋

Organo-metal-halide perovskites are a promising set of materials for optoelectronic applications such as solar cells, light emitting diodes and lasers. Perovskite thin films have demonstrated amplified spontaneous emission thresholds as low as 1.6 μJ cm-2 and lasing thresholds as low as 0.2 μJ cm-2. Recently the performance of perovskite light emitting diodes has rapidly risen due to the formation of quasi 2D films using bulky ligands such as phenylethylammonium. Despite the high photoluminescent yield and external quantum efficiency of quasi 2D perovskites, few reports exist on amplified spontaneous emission. We show within this report that the threshold for amplified spontaneous emission of quasi 2D perovskite films increases with the concentration of phenylethylammonium. We attribute this increasing threshold to a charge transfer state at the PEA interface that competes for excitons with the ASE process. Additionally, the comparatively slow inter-grain charge transfer process cannot significantly contribute to the fast radiative recombination in amplified spontaneous emission. These results suggest that relatively low order PEA based perovskite films that are suitable for LED applications are not well suited for lasing applications. However high order films were able to maintain their low threshold values and may still benefit from improved stability.

元の言語英語
ページ(範囲)15030-15036
ページ数7
ジャーナルPhysical Chemistry Chemical Physics
20
発行部数22
DOI
出版物ステータス出版済み - 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

フィンガープリント Amplified spontaneous emission in phenylethylammonium methylammonium lead iodide quasi-2D perovskites' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用