Luminescence Analysis of Charge-Carrier Separation and Internal Series-Resistance Losses in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>Cu</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>In</mml:mi><mml:mo>,</mml:mo><mml:mi>Ga</mml:mi><mml:mo stretchy="false">)</mml:mo><mml:msub><mml:mi>Se</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
 Solar Cells

Rau, Uwe; Huhn, Vito; Pieters, Bart E.

doi:10.1103/physrevapplied.14.014046

Cited by 29 publications

(20 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rau links this same anomalous “residual luminescence” observed at short circuit in Cu(In,Ga)Se 2 solar cells directly to the ratio of the short-circuit current to the current generated in the material . In the case of perovskite solar cells, we verify that a similar expression does in fact correlate with losses in short-circuit current and use it to generate spatially resolved maps of “current collection” at short circuit.…”

supporting

confidence: 64%

Visualizing Macroscopic Inhomogeneities in Perovskite Solar Cells

et al. 2022

View full text Add to dashboard Cite

Despite the incredible progress made, the highest efficiency perovskite solar cells are still restricted to small areas (<1 cm 2 ). In large part, this stems from a poor understanding of the widespread spatial heterogeneity in devices. Conventional techniques to assess heterogeneities can be time consuming, operate only at microscopic length scales, and demand specialized equipment. We overcome these limitations by using luminescence imaging to reveal large, millimeter-scale heterogeneities in the inferred electronic properties. We determine spatially resolved maps of "charge collection quality", measured using the ratio of photoluminescence intensity at open and short circuit. We apply these methods to quantify the inhomogeneities introduced by a wide range of transport layers, thereby ranking them by suitability for upscaling. We reveal that top-contacting transport layers are the dominant source of heterogeneity in the multilayer material stack. We suggest that this methodology can be used to accelerate the development of highly efficient, large-area modules, especially through high-throughput experimentation.

show abstract

supporting

confidence: 64%

Visualizing Macroscopic Inhomogeneities in Perovskite Solar Cells

et al. 2022

View full text Add to dashboard Cite

show abstract

“…from the differentiation and reintegration of the original data. From the scaled absorptance spectrum, we are able to calculate the saturation spectrum f PL,0 (E) [eqn (10)], shown by the blue curve in Fig. 8a.…”

Section: Faraday Discussion Papermentioning

confidence: 99%

“…no gradients in the quasi Fermi levels exist. For this reason, the qFls is sometimes labelled the "internal voltage", 10,11 although it is a local measure and not the potential difference between two different spatial points.…”

mentioning

confidence: 99%

Photoluminescence assessment of materials for solar cell absorbers

et al. 2022

View full text Add to dashboard Cite

show abstract

“…These equations therefore neglect a possible difference between the internal split of quasi-Fermi-levels and the externally measured voltage. [83,84] They assume a simple high-level injection recombination mechanism with ideality factor n id = 2 for the part of the recombination that is limited by SRH recombination superimposed with radiative recombination with n id = 1 toward higher injection conditions [69,85] while it disregards shallow defects that cannot be described by a simple SRH lifetime. All these effects may lead to deviations from the observation of three distinct and discernible regimes which will necessitate the use of numerical models for data interpretation as we have shown in Figures 4 and 8.…”

Section: Discussion and Outlookmentioning

confidence: 99%