Simultaneous Ligand Exchange Fabrication of Flexible Perovskite Solar Cells using Newly Synthesized Uniform Tin Oxide Quantum Dots

So Yeon Park, Mi Yeon Baek, Yeonkyeon Ju, Dong Hoe Kim, Chan Su Moon, Jun Hong Noh, Hyun Suk Jung

Research output: Contribution to journalArticle

6 Citations (Scopus)


Halide perovskite solar cells (HPSCs) have a significant potential for future photovoltaic systems because of a high power conversion efficiency (PCE) exceeding 23% using solution processing methods. A low-temperature processed oxide layer is a challenging issue for large-scale manufacture of flexible and low-cost HPSCs. Here, we propose a simple reverse micelle-water injection method for highly dispersed ligand-capped ultrafine SnO2 quantum dots (QD). Interestingly, we observed that the ligands, which help in the formation of a uniform SnO2 QD thin film, spontaneously exchange for halide through a perovskite solution, and finally we form a suitable SnO2 QD-halide junction for high-performance HPSCs. The flexible HPSC with the SnO2 QD-halide junction formed via the ligand exchange exhibits a high PCE of 17.7% using a flexible substrate. It also shows an excellent flexibility, where the initial PCE is maintained within 92% after 1000 bending cycles with a bending radius of 18 mm.

Original languageEnglish
Pages (from-to)5460-5467
Number of pages8
JournalJournal of Physical Chemistry Letters
Issue number18
Publication statusPublished - 2018 Sep 20


ASJC Scopus subject areas

  • Materials Science(all)

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