Integrated Perovskite/Bulk-Heterojunction toward Efficient Solar Cells
- 18 December 2014
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 15 (1), 662-668
- https://doi.org/10.1021/nl504168q
Abstract
We successfully demonstrated an integrated perovskite/bulk-heterojunction (BHJ) photovoltaic device for efficient light harvesting and energy conversion. Our device efficiently integrated two photovoltaic layers, namely a perovskite film and organic BHJ film, into the device. The device structure is ITO/TiO2/perovskite/BHJ/MoO3/Ag. A wide bandgap small molecule DOR3T-TBDT was used as donor in the BHJ film, and a power conversion efficiency (PCE) of 14.3% was achieved in the integrated device with a high short circuit current density (JSC) of 21.2 mA cm(-2). The higher JSC as compared to that of the traditional perovskite/HTL (hole transporting layer) device (19.3 mA cm(-2)) indicates that the BHJ film absorbs light and contributes to the current density of the device. Our result further suggests that the HTL in traditional perovskite solar cell, even with good light absorption capability, cannot contribute to the overall device photocurrent, unless this HTL becomes a BHJ layer (by adding electron transporting material like PC71BM).Keywords
Funding Information
- Office of Naval Research (N000141110250)
- Division of Materials Research (DMR-1335645)
This publication has 33 references indexed in Scilit:
- The light and shade of perovskite solar cellsNature Materials, 2014
- Perovskite solar cells: an emerging photovoltaic technologyMaterials Today, 2014
- The emergence of perovskite solar cellsNature Photonics, 2014
- Efficient, high yield perovskite photovoltaic devices grown by interdiffusion of solution-processed precursor stacking layersEnergy & Environmental Science, 2014
- Organohalide lead perovskites for photovoltaic applicationsEnergy & Environmental Science, 2014
- Sub-150 °C processed meso-superstructured perovskite solar cells with enhanced efficiencyEnergy & Environmental Science, 2014
- Efficient planar heterojunction perovskite solar cells by vapour depositionNature, 2013
- Sequential deposition as a route to high-performance perovskite-sensitized solar cellsNature, 2013
- Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding 9%Scientific Reports, 2012
- Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic CellsJournal of the American Chemical Society, 2009