| Autor: |
Richter, JM, Abdi-Jalebi, M, Sadhanala, A, Tabachnyk, M, Rivett, JPH, Pazos-Outón, LM, Gödel, KC, Price, M, Deschler, F, Friend, RH |
| Přispěvatelé: |
Sadhanala, Aditya [0000-0003-2832-4894], Price, Michael [0000-0003-2227-0514], Deschler, Felix [0000-0002-0771-3324], Friend, Richard [0000-0001-6565-6308], Apollo - University of Cambridge Repository |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016) |
| Popis: |
In lead halide perovskite solar cells, there is at least one recycling event of electron-hole pair to photon to electron-hole pair at open circuit under solar illumination. This can lead to a significant reduction in the external photoluminescence yield from the internal yield. Here we show that, for an internal yield of 70%, we measure external yields as low as 15% in planar films, where light out-coupling is inefficient, but observe values as high as 57% in films on textured substrates that enhance out-coupling. We analyse in detail how externally measured rate constants and photoluminescence efficiencies relate to internal recombination processes under photon recycling. For this, we study the photo-excited carrier dynamics and use a rate equation to relate radiative and non-radiative recombination events to measured photoluminescence efficiencies. We conclude that the use of textured active layers has the ability to improve power conversion efficiencies for both LEDs and solar cells. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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