Abstract
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 language | English |
|---|---|
| Pages (from-to) | 5460-5467 |
| Number of pages | 8 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 9 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2018 Sept 20 |
Bibliographical note
Funding Information:This research was supported by Basic Research Lab Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2017R1A2B3010927, NRF-2015M1A2A2056827). This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2017R1A2B2009676, NRF-2017M3A6A7051089, and NRF-2017R1A4A1015022).
ASJC Scopus subject areas
- General Materials Science
- Physical and Theoretical Chemistry
