Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells
| Autor: | Lukas Pfeifer, Pascal Schouwink, Thomas Baumeler, Ursula Rothlisberger, Shaik M. Zakeeruddin, George C. Fish, Anders Hagfeldt, Felix Eickemeyer, Mounir Mensi, Olivier Ouellette, Viktor Škorjanc, Anurag Krishna, Elsa John, Michael Grätzel, Linfeng Pan, Essa A. Alharbi, Paramvir Ahlawat, Jacques-E. Moser, Mathias Dankl, Claudia E. Avalos, Bowen Yang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Carrier dynamics Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Power conversion efficiency chemistry.chemical_compound Materials Chemistry Perovskites Triiodide Perovskite (structure) Renewable Energy Sustainability and the Environment business.industry Energy conversion efficiency Additives Defect engineering 021001 nanoscience & nanotechnology 0104 chemical sciences Fuel Technology chemistry Chemistry (miscellaneous) Optoelectronics Defects 0210 nano-technology business |
| Zdroj: | ACS Energy Letters. 6:3650-3660 |
| ISSN: | 2380-8195 |
| Popis: | The defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI3) as an additive to the perovskite precursor solution. We examine the effect of MAI3 on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI3 suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining ∼90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|