Exploring the Limiting Open-Circuit Voltage and the Voltage Loss Mechanism in Planar CH3NH3PbBr3 Perovskite Solar Cells

Chen S, Hou Y, Chen H, Richter M, Guo F, Kahmann S, Tang X, Stubhan T, Zhang H, Li N, Gasparini N, Ramírez Quiroz CO, Khanzada LS, Matt G, Osvet A, Brabec C (2016)


Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2016

Journal

Book Volume: 6

Article Number: 1600132

Journal Issue: 18

DOI: 10.1002/aenm.201600132

Abstract

Perovskite solar cells based on CHNHPbBr with a band gap of 2.3 eV are attracting intense research interests due to their high open-circuit voltage (V) potential, which is specifically relevant for the use in tandem configuration or spectral splitting. Many efforts have been performed to optimize the V of CHNHPbBr solar cells; however, the limiting V (namely, radiative V:V) and the corresponding ΔV (the difference between V and V) mechanism are still unknown. Here, the average V of 1.50 V with the maximum value of 1.53 V at room temperature is achieved for a CHNHPbBr solar cell. External quantum efficiency measurements with electroluminescence spectroscopy determine the V of CHNHPbBr cells with 1.95 V and a ΔV of 0.45 V at 295 K. When the temperature declines from 295 to 200 K, the obtained V remains comparably stable in the vicinity of 1.5 V while the corresponding ΔV values show a more significant increase. Our findings suggest that the V of CHNHPbBr cells is primarily limited by the interface losses induced by the charge extraction layer rather than by bulk dominated recombination losses. These findings are important for developing strategies how to further enhance the V of CHNHPbBr-based solar cells.

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APA:

Chen, S., Hou, Y., Chen, H., Richter, M., Guo, F., Kahmann, S.,... Brabec, C. (2016). Exploring the Limiting Open-Circuit Voltage and the Voltage Loss Mechanism in Planar CH3NH3PbBr3 Perovskite Solar Cells. Advanced Energy Materials, 6(18). https://dx.doi.org/10.1002/aenm.201600132

MLA:

Chen, Shi, et al. "Exploring the Limiting Open-Circuit Voltage and the Voltage Loss Mechanism in Planar CH3NH3PbBr3 Perovskite Solar Cells." Advanced Energy Materials 6.18 (2016).

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