CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 11474 > Article
Presentation
22 August 2020 Understanding the temperature dependence of hybrid perovskite band gaps in terms of thermal expansion and electron-phonon interaction
Alejandro Rodolfo Goñi, Adrián Francisco-López, Kai Xu, Bethan Charles, Marie Isabel Alonso, Miquel Garriga, Mariano Campoy-Quiles, Mark T. Weller, Jarvist M. Frost
Author Affiliations +
Proceedings Volume 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI; 114740J (2020) https://doi.org/10.1117/12.2570672
Event: SPIE Organic Photonics + Electronics, 2020, Online Only
Abstract
The fundamental gap of hybrid lead halide perovskites decreases linearly with decreasing temperature at ambient conditions. Using MAPbI3 (MA, methylammonium) as example, I will show that this atypical gap renormalization with temperature is due to an equal footing of thermal expansion and electron-phonon interaction effects. I will also present recent results obtained for FAxMA1-xPbI3 solid solutions (FA, formamidinium). Strikingly, the temperature dependence of the gap of a phase stable at intermediate compositions and below ca. 250 K exhibits a quadratic bowing with temperature. Band-structure and lattice-dynamics calculations provide crucial insights into this intriguing temperature behavior of the gap.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Alejandro Rodolfo Goñi, Adrián Francisco-López, Kai Xu, Bethan Charles, Marie Isabel Alonso, Miquel Garriga, Mariano Campoy-Quiles, Mark T. Weller, and Jarvist M. Frost "Understanding the temperature dependence of hybrid perovskite band gaps in terms of thermal expansion and electron-phonon interaction", Proc. SPIE 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI, 114740J (22 August 2020); https://doi.org/10.1117/12.2570672
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Perovskite
Thermal effects
Lead
Solids
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top