Abstract
A solution-processable planar perylene diimide, N,N´-dipentyl-3,4,9,10-perylenedicarboximide (PDI), has been demonstrated as a suitable acceptor material to replace the conventional fullerene derivatives (e.g., PCBM) found in inverted perovskite solar cells (PSCs). The energy offset between the perovskite and PDI layers was optimized by varying the ratio of halides (iodide to bromide) to improve the exciton dissociation and carrier transport. The PDI acceptor material had higher electron mobility and smoother morphology on perovskite relative to those of PCBM, leading to enhancements in the short circuit current density, fill factor, and power conversion efficiency. The incorporation of PDI in the perovskite devices decreased recombination losses and improved the device stability. The performance of the best PSC containing PDI as the electron transport layer (11%) was higher than that of the best device featuring PCBM (10%).
| Original language | English |
|---|---|
| Pages (from-to) | 78-85 |
| Number of pages | 8 |
| Journal | Solar Energy Materials and Solar Cells |
| Volume | 169 |
| DOIs | |
| State | Published - 01 09 2017 |
Bibliographical note
Publisher Copyright:© 2017
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Carrier recombination
- Electron transport layer
- Hybrid perovskite solar cells
- Perylene diimide
- Space charge limited current
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