2014 GCEP Distinguished Student Lecturers | Perovskite Solar Cells

TL;DR

Layered perovskite solar cells show rapid increases in efficiency and offer the potential for added functionality compared to traditional perovskite solar cells.

Transcript

thank you for the introduction so first I just want to show you a little bit about the background to my research so this is a chart that is presented by NREL occasionally and it charts the progress of each technology and solar cell research so you can match or so you can watch the efficiency as the years go on and as you can see many decades go int... Read More

Key Insights

• ❓ Layered perovskite solar cells show rapid increases in efficiency compared to traditional perovskite solar cells.
• 🤕 The N-value in layered perovskite structures determines the band gap and dimensionality of the material.
• 🌥️ Layered perovskite solar cells offer the potential for added functionalities due to the incorporation of larger organic molecules.
• 💁 Challenges in layered perovskite solar cell research include addressing issues of toxicity, stability, and film formation consistency.
• 🤕 Layered perovskite solar cells may be better suited for tandem devices due to their larger band gaps.
• 💿 The optical properties of layered perovskite solar cells can be determined through absorption and photoluminescence measurements.
• ❓ Device performance of layered perovskite solar cells can be affected by the presence of impurity phases and limited carrier mobility.

Questions & Answers

Q: How do traditional perovskite solar cells compare to layered perovskite solar cells in terms of efficiency?

Traditional perovskite solar cells have shown steady increases in efficiency, but layered perovskite solar cells, particularly those with higher N-values, show even greater potential for efficiency improvements.

Q: What is the role of the N-value in layered perovskite structures?

The N-value in layered perovskite structures refers to the number of lead iodide octahedra in each sheet. Higher N-values result in reduced dimensionality and increased band gap.

Q: What are the advantages of layered perovskite solar cells compared to traditional perovskite solar cells?

Layered perovskite solar cells have a unique structure with larger organic molecules added, allowing for the incorporation of additional functionalities and potential improvements in efficiency.

Q: What are the challenges associated with layered perovskite solar cells?

Challenges include issues of toxicity and stability, particularly in regards to the lead content and its solubility in water. Additionally, the consistent formation of high-quality films is a challenge that needs to be addressed.

Summary & Key Takeaways

• Traditional perovskite solar cells have shown steady increases in efficiency over the years, but layered perovskite solar cells show even greater potential for efficiency improvements.

• Layered perovskite solar cells have a unique structure with larger organic molecules added, allowing for the incorporation of additional functionalities.

• The N-value in layered perovskite structures refers to the number of lead iodide octahedra in each sheet, with higher N-values leading to reduced dimensionality and increased band gap.