Determining the photocurrent of individual cells within an organic solar module by LBIC and the filtering approach: Experiments and simulations

Reinhardt, Jens; Apilo, Pälvi; Zimmermann, Birger; Rousu, Sanna; Würfel, Uli

doi:10.1016/j.solmat.2014.11.032

Cited by 7 publications

(4 citation statements)

References 27 publications

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“…420 To solve these problems, Song et al 178,420 reported the study of the photocurrent collection nonuniformities in the individual cells of perovskite/Si TSCs (Figure 62a) via the light beam induced current (LBIC) method, which has been used for identifying processing defects in cells and modules by spatially resolving the photocurrent generation and collection. 421,422 Laser light at different wavelengths (532 and 1064 nm) and at a relatively low power density (∼800 mW cm −2 , to avoid possible illumination damage on the PSC) is used to excite charge carriers in the subcells. The photogenerated current is calibrated for EQE to construct LBIC mapping.…”

Section: Which Tsc Is the Best?mentioning

confidence: 99%

Perovskite Tandem Solar Cells: From Fundamentals to Commercial Deployment

2020

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Multi-junction (tandem) solar cells (TSCs) consisting of multiple light absorbers with considerably different band gaps show great potential in breaking the Shockley−Queisser (S−Q) efficiency limit of a single junction solar cell by absorbing light in a broader range of wavelengths. Perovskite solar cells (PSCs) are ideal candidates for TSCs due to their tunable band gaps, high PCE up to 25.2%, and easy fabrication. PSCs with high PCEs are typically fabricated via a low temperature solution method, which are easy to combine with many other types of solar cells like silicon (Si), copper indium gallium selenide (CIGS), narrow band gap PSCs, dye-sensitized, organic, and quantum dot solar cells. As a matter of fact, perovskite TSCs have stimulated enormous scientific and industrial interest since their first development in 2014. Significant progress has been made on the development of perovskite TSCs both in the research laboratories and industrial companies. This review will rationalize the recent exciting advancement in perovskite TSCs. We begin with the introduction of the historical development of TSCs in a broader context, followed by the summary of the state-of-the-art development of perovskite TSCs with various types of device architectures. We then discuss the strategies for improving the PCEs of perovskite TSCs, including but not limited to the design considerations on the transparency of perovskite absorbers and metal electrodes, protective layers, and recombination layers (RLs)/tunnel junctions (TJs), with a particular focus on the band gap tuning and thickness adjustment of active layers. We subsequently introduce a range of measurement techniques for the characterization of perovskite TSCs. We also cover other core issues related to the large-scale applications and commercialization. Finally, we offer our perspectives on the future development of emerging photovoltaic technologies as the device performance enhancement and cost reduction are central to almost any type of solar cell applied in the perovskite TSCs.

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Section: Which Tsc Is the Best?mentioning

confidence: 99%

Perovskite Tandem Solar Cells: From Fundamentals to Commercial Deployment

2020

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“…Light beam induced current (LBIC) imaging has been demonstrated as a versatile method for identifying processing defects in cells and modules by spatially resolving the photocurrent generation and collection. − In the present contribution, we use LBIC to probe photocurrent nonuniformities in the individual subcells of perovskite/Si tandem solar cells. By using laser light at different wavelengths in combination with background light bias, we can identify processing defects and efficiency-limiting regions and provide in-depth quantitative analysis of current generation and transport in the individual subcells.…”

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confidence: 99%

Probing Photocurrent Nonuniformities in the Subcells of Monolithic Perovskite/Silicon Tandem Solar Cells

Song

Werner

Shrestha

et al. 2016

J. Phys. Chem. Lett.

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Perovskite/silicon tandem solar cells with high power conversion efficiencies have the potential to become a commercially viable photovoltaic option in the near future. However, device design and optimization is challenging because conventional characterization methods do not give clear feedback on the localized chemical and physical factors that limit performance within individual subcells, especially when stability and degradation is a concern. In this study, we use light beam induced current (LBIC) to probe photocurrent collection nonuniformities in the individual subcells of perovskite/silicon tandems. The choices of lasers and light biasing conditions allow efficiency-limiting effects relating to processing defects, optical interference within the individual cells, and the evolution of water-induced device degradation to be spatially resolved. The results reveal several types of microscopic defects and demonstrate that eliminating these and managing the optical properties within the multilayer structures will be important for future optimization of perovskite/silicon tandem solar cells.

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“…Electrical characterization based on current-voltage (IV) measurement can provide information on the overall functionality of the optoelectronic devices and provide information about the malfunction of the device but not the location of the problem [11]. Electro-optical imaging techniques such as light beam induced current (LBIC) mapping, dark lock-in thermography (DLIT), electroluminescense (EL) imaging, and photoluminescence (PL) imaging are able to reveal the details on registration, defects, particles, shunts and processing variations affecting electrical functionality [12][13][14][15]. These techniques have also proven useful for inline inspection, monitoring and process control [12,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Defect Recognition of Roll-to-Roll Printed Conductors Using Dark Lock-in Thermography and Localized Segmentation

et al. 2022

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The demand for flexible large area optoelectronic devices such as organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs) is growing. Roll-to-roll (R2R) printing enables cost-efficient industrial production of optoelectronic devices. The performance of electronic devices may significantly suffer from local electrical defects. The dark lock-in infrared thermography (DLIT) method is an effective non-destructive testing (NDT) tool to identify such defects as hot spots. In this study, a DLIT inspection system was applied to visualize the defects of R2R printed silver conductors on flexible plastic substrates. A two-stage automated defect recognition (ADR) methodology was proposed to detect and localize two types of typical electrical defects, which are caused by complete or partial breaks on the printed conductive wires, based on localized segmentation and thresholding methods.

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Determining the photocurrent of individual cells within an organic solar module by LBIC and the filtering approach: Experiments and simulations

Cited by 7 publications

References 27 publications

Perovskite Tandem Solar Cells: From Fundamentals to Commercial Deployment

Perovskite Tandem Solar Cells: From Fundamentals to Commercial Deployment

Probing Photocurrent Nonuniformities in the Subcells of Monolithic Perovskite/Silicon Tandem Solar Cells

Defect Recognition of Roll-to-Roll Printed Conductors Using Dark Lock-in Thermography and Localized Segmentation

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