التفاصيل البيبلوغرافية
| العنوان: |
Surface Passivation with a Fluorocarbon-Based Pyridine Derivative for High-Crystallinity Perovskite Solar Cells with Efficiency Over 20% and Good Humidity Stability |
| المؤلفون: |
Meijuan Long (8539824), Jin Zhang (53297), Pengfei Guo (421384), Kaiyuan Zhang (5008814), Chen Liu (75209), Qian Ye (610320), Hongqiang Wang (1428448) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Molecular Biology, Biotechnology, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, verified via photoluminescence, film optoelectronic devices, power conversion efficiency, perovskite solar cells, moisture ambient condition, based pyridine derivative, 2 +, pyridine derivative, film surfaces, work provides, undercoordinated pb, trap states, results demonstrate, recent years, rapid loss, pyridinic nitrogen, promising strategy, practical elimination, poor long, photovoltaic response, perovskite films, perovskite could, hysteresis due, hydrophobic effects, grain boundaries |
| الوصف: |
Organic–inorganic hybrid perovskite solar cells (PSCs) are presently gaining significant attention owing to their high conversion efficiencies achieved in recent years. However, poor long-term stability against water and defects at film surfaces and grain boundaries are important factors causing performance degradation and rapid loss of the photovoltaic response. To remedy this, a pyridine derivative with long C–F chains (PFAD) is synthesized and employed as a passivator to reduce the trap states of perovskite and promote better humidity stability via antisolvent properties. The results demonstrate that the trap states of perovskite could be minimized by the presence of pyridinic nitrogen and then the formation of coordination bonds with undercoordinated Pb 2+ ions. The resulting carrier recombination time is prolonged and verified via photoluminescence. The power conversion efficiency (PCE) of the PFAD-passivated perovskite solar cell increased to 20.48%, with practical elimination of hysteresis due to the high quality of the perovskite films. The significant gain generated via PFAD modification supports further applications in thin-film optoelectronic devices. Moreover, PFAD-modified devices exhibit enhanced humidity stability due to the protection of hydrophobic C–F chains from moisture; the PCE decreased about 15% after 30 days of exposure in a moisture ambient condition. Our work provides a promising strategy to further improve the performance and stability of perovskite solar cells by designing bifunctional organic molecules with passivation and hydrophobic effects. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Surface_Passivation_with_a_Fluorocarbon-Based_Pyridine_Derivative_for_High-Crystallinity_Perovskite_Solar_Cells_with_Efficiency_Over_20_and_Good_Humidity_Stability/16699168 |
| DOI: |
10.1021/acsaem.1c01295.s001 |
| الاتاحة: |
https://doi.org/10.1021/acsaem.1c01295.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.30C23C19 |
| قاعدة البيانات: |
BASE |