BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Development of an LED-based External Quantum Efficiency measuremen t setup and validation tests on practical photovoltaic devices DTSTART:20260629T140000Z DTEND:20260629T160000Z DTSTAMP:20260802T073425Z UID:6167ef8d-0604-4a44-8eba-8772403accfa SEQUENCE:2 CREATED:20260625T101159Z DESCRIPTION:Cell and module characterization represents a central aspect o f photovoltaic research and development. In particular\, the external quan tum efficiency (EQE) provides detailed insight into the spectral response of a photovoltaic device\, enabling the derivation of key performance-rela ted parameters and the identification of optical and electrical losses. Th is thesis builds upon an existing experimental setup based on an LED solar simulator to enable EQE measurements on mini-modules fabricated at the pr ototyping laboratory of the Eurac Institute for Renewable Energy. The prim ary objective was to develop a fully automated measurement procedure. To t his end\, a Python-based control routine was implemented\, allowing the se quential activation of individual LEDs of the simulator\, automated curren t acquisition\, and subsequent data processing and visualization. A compre hensive data acquisition framework was established\, enabling reproducible and automated measurements. Furthermore\, several improvements were intro duced to enhance data quality\, including refined current measurement proc edures and an optimized calibration approach. The performance of the syste m was evaluated on photovoltaic cells and mini-modules with varying optica l properties. The developed setup demonstrated good suitability for compar ative analyses of modules exhibiting different optical behaviors. Although certain limitations remain\, the system proved capable of reliably captur ing spectral trends and key characteristics\, including ultraviolet cut-of f behavior and losses associated with coloring techniques\, thereby provid ing a practical and pivotal tool for mini-module characterization. LAST-MODIFIED:20260625T101210Z LOCATION:Online URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/development-of-an-led-base d-external-quantum-efficiency-measurement-setup-and-validation-tests-on-pr actical-photovoltaic-devices/ X-ALT-DESC;FMTTYPE=text/html:

Cell and module cha racterization represents a central aspect of photovoltaic research and dev elopment. In particular\, the external quantum efficiency (EQE) provides d etailed insight into the spectral response of a photovoltaic device\, enab ling the derivation of key performance-related parameters and the identifi cation of optical and electrical losses. This thesis builds upon an existi ng experimental setup based on an LED solar simulator to enable EQE measur ements on mini-modules fabricated at the prototyping laboratory of the Eur ac Institute for Renewable Energy.

The primary objective was to develop a fully automated measurement procedure. To this end\, a Python-ba sed control routine was implemented\, allowing the sequential activation o f individual LEDs of the simulator\, automated current acquisition\, and s ubsequent data processing and visualization. A comprehensive data acquisit ion framework was established\, enabling reproducible and automated measur ements.

Furthermore\, several improvements were introduced to en hance data quality\, including refined current measurement procedures and an optimized calibration approach. The performance of the system was evalu ated on photovoltaic cells and mini-modules with varying optical propertie s. The developed setup demonstrated good suitability for comparative analy ses of modules exhibiting different optical behaviors. Although certain li mitations remain\, the system proved capable of reliably capturing spectra l trends and key characteristics\, including ultraviolet cut-off behavior and losses associated with coloring techniques\, thereby providing a pract ical and pivotal tool for mini-module characterization.

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