Abstract
Tin-based halide perovskite solar cells (PSCs) hold the most promise among lead-free PSCs, but they are plagued with inadequate environmental stability and power-conversion efficiency (PCE). Here we demonstrate that the optimum incorporation of a bulky divalent organic cation, 4-(aminomethyl)piperidinium (4AMP), in FASnI3 thin films improves stability, optoelectronic properties, and PSC performance. The optimized PSC yields a maximum PCE of 10.9% and good 500-h operational stability under continuous illumination. This is attributed to the unique thin-film structure, where the strong ionic bonding afforded by divalent 4AMP may provide near-full-coverage functionalization (encapsulation) of FASnI3 grain surfaces and grain boundaries, retarding O2/H2O ingression and mitigating Sn-defects for reduced photocarrier nonradiative recombination.
| Original language | English |
|---|---|
| Pages (from-to) | 2223-2230 |
| Number of pages | 8 |
| Journal | ACS Energy Letters |
| Volume | 5 |
| Issue number | 7 |
| DOIs | |
| State | Published - 10 Jul 2020 |
| Externally published | Yes |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
-
SDG 7 Affordable and Clean Energy
Fingerprint
Dive into the research topics of 'High-Performance Lead-Free Solar Cells Based on Tin-Halide Perovskite Thin Films Functionalized by a Divalent Organic Cation'. Together they form a unique fingerprint.Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver