| Autor: |
Azhar, Fakharuddin, Alessandro L, Palma, Francesco, Di Giacomo, Simone, Casaluci, Fabio, Matteocci, Qamar, Wali, Muhammad, Rauf, Aldo, Di Carlo, Thomas M, Brown, Rajan, Jose |
| Rok vydání: |
2015 |
| Zdroj: |
Nanotechnology. 26(49) |
| ISSN: |
1361-6528 |
| Popis: |
The past few years have witnessed remarkable progress in solution-processed methylammonium lead halide (CH3NH3PbX3, X = halide) perovskite solar cells (PSCs) with reported photoconversion efficiency (η) exceeding 20% in laboratory-scale devices and reaching up to 13% in their large area perovskite solar modules (PSMs). These devices mostly employ mesoporous TiO2 nanoparticles (NPs) as an electron transport layer (ETL) which provides a scaffold on which the perovskite semiconductor can grow. However, limitations exist which are due to trap-limited electron transport and non-complete pore filling. Herein, we have employed TiO2 nanorods (NRs), a material offering a two-fold higher electronic mobility and higher pore-filing compared to their particle analogues, as an ETL. A crucial issue in NRs' patterning over substrates is resolved by using precise Nd:YVO4 laser ablation, and a champion device with η ∼ 8.1% is reported via a simple and low cost vacuum-vapor assisted sequential processing (V-VASP) of a CH3NH3PbI3 film. Our experiments showed a successful demonstration of NRs-based PSMs via the V-VASP technique which can be applied to fabricate large area modules with a pin-hole free, smooth and dense perovskite layer which is required to build high efficiency devices. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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