Self-absorption correction for solid-state photoluminescence quantum yields obtained from integrating sphere measurements

Abstract

A new method is presented for analyzing the effects of self-absorption on photoluminescence integrating sphere quantum yield measurements. Both the observed quantum yield and luminescence spectrum are used to determine the self-absorption probability, taking into account both the initial emission and subsequent absorption and reemission processes. The analysis is experimentally validated using the model system of the laser dye perylene red dispersed in a polymer film. This approach represents an improvement over previous methods that tend to overestimate the true quantum yield, especially in cases with high sample absorbance or quantum yield values.

Spectral-based analysis of thin film luminescent solar concentrators

“…2c). In order to calculate η SA , the observed edge emission of the LSC under full illumination (S edge ) has to be scaled to match the true emission spectrum of a dilute solution of Red 305 (S true ) in the long wavelength region (680 -750 nm), where no self-absorption occurs (Ahn et al, 2007;Kittidachachan et al, 2007). The scaled edge spectrum S ′ edge represents the 'surviving' light and η SA is:…”

“…The perylene dye Lumogen F Red 305 (hereafter referred to as Red 305) is well suited for application in LSCs, as the absorption covers a large part of the visible range Kinderman et al, 2007;Slooff et al, 2008;Meyer and Markvart, 2009). Furthermore, Red 305 features a near-unity luminescence quantum yield (η yield = 1) (Ahn et al, 2007;Wilson and Richards, 2009) and good intrinsic stability (Seybold and Wagenblast, 1989;van Sark et al, 2008). High concentrations of Red 305 in PMMA can be achieved without aggregation (Al-Kaysi et al, 2006).…”

Strong room-temperature blue-violet photoluminescence of multiferroic BaMnF4

“…Till now, the supposed self-absorption has been conformed rationally. Self-absorption is a common case for solid luminescent 7 materials, and has been researched for many years [31,[33][34][35][36][37]. In some solid state, physical phenomena such as multiple scattering and self-absorption of the emitted light may occur, leading to the distortion or split of the luminescence features, thus compromising the data interpretation [31,38].…”

Optical efficiency characterization of LED phosphors using a double integrating sphere system

“…Second, the SA which is due to the integrating sphere instrument, as the light emitted from the sample can be reabsorbed due to multiple reflections inside the sphere and the sample [6,18]. In this paper, the interpretation and evaluation of self-absorption phenomena is carried out following the methodology proposed by Ahn et al [19], where the parameter a can be interpreted as the reabsorption probability of self-absorption of an emitted photon. It is evaluated using equation 3 [19], where the integrated emission spectral power of the "distorted" luminescent sample, P d (λ em ), is compared to the "undisturbed" (without self-absorption, true spectra) integrated emission spectra of the same luminescent material P(λ em ).…”

“…In this paper, the interpretation and evaluation of self-absorption phenomena is carried out following the methodology proposed by Ahn et al [19], where the parameter a can be interpreted as the reabsorption probability of self-absorption of an emitted photon. It is evaluated using equation 3 [19], where the integrated emission spectral power of the "distorted" luminescent sample, P d (λ em ), is compared to the "undisturbed" (without self-absorption, true spectra) integrated emission spectra of the same luminescent material P(λ em ). This undisturbed emission spectrum can be obtained using very diluted (low concentration: 3%) samples.…”