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:20260810T190013Z UID:6167ef8d-0604-4a44-8eba-8772403accfa SEQUENCE:1 CREATED:20260625T101123Z DESCRIPTION: Cell and module characterization represents a central aspect of photovoltaic research and development. In particular\, the external qua ntum efficiency (EQE) provides detailed insight into the spectral response of a photovoltaic device\, enabling the derivation of key performance-rel ated parameters and the identification of optical and electrical losses. T his thesis builds upon an existing experimental setup based on an LED sola r simulator to enable EQE measurements on mini-modules fabricated at the p rototyping laboratory of the Eurac Institute for Renewable Energy. The pri mary objective was to develop a fully automated measurement procedure. To this end\, a Python-based control routine was implemented\, allowing the s equential activation of individual LEDs of the simulator\, automated curre nt acquisition\, and subsequent data processing and visualization. A compr ehensive data acquisition framework was established\, enabling reproducibl e and automated measurements. Furthermore\, several improvements were intr oduced to enhance data quality\, including refined current measurement pro cedures and an optimized calibration approach. The performance of the syst em was evaluated on photovoltaic cells and mini-modules with varying optic al properties. The developed setup demonstrated good suitability for compa rative analyses of modules exhibiting different optical behaviors. Althoug h certain limitations remain\, the system proved capable of reliably captu ring spectral trends and key characteristics\, including ultraviolet cut-o ff behavior and losses associated with coloring techniques\, thereby provi ding a practical and pivotal tool for mini-module characterization. LAST-MODIFIED:20260625T101123Z LOCATION:Online URL:http://df.vps.tecnico.ulisboa.pt/en/events/development-of-an-led-based -external-quantum-efficiency-measurement-setup-and-validation-tests-on-pra ctical-photovoltaic-devices/ X-ALT-DESC;FMTTYPE=text/html:

Cell and module ch aracterization represents a central aspect of photovoltaic research and de velopment. In particular\, the external quantum efficiency (EQE) provides detailed insight into the spectral response of a photovoltaic device\, ena bling the derivation of key performance-related parameters and the identif ication of optical and electrical losses. This thesis builds upon an exist ing experimental setup based on an LED solar simulator to enable EQE measu rements on mini-modules fabricated at the prototyping laboratory of the Eu rac Institute for Renewable Energy.

The primary objective was to develop a fully automated measurement procedure. To this end\, a Python-b ased control routine was implemented\, allowing the sequential activation of individual LEDs of the simulator\, automated current acquisition\, and subsequent data processing and visualization. A comprehensive data acquisi tion framework was established\, enabling reproducible and automated measu rements.

Furthermore\, several improvements were introduced to e nhance data quality\, including refined current measurement procedures and an optimized calibration approach. The performance of the system was eval uated on photovoltaic cells and mini-modules with varying optical properti es. The developed setup demonstrated good suitability for comparative anal yses of modules exhibiting different optical behaviors. Although certain l imitations remain\, the system proved capable of reliably capturing spectr al trends and key characteristics\, including ultraviolet cut-off behavior and losses associated with coloring techniques\, thereby providing a prac tical and pivotal tool for mini-module characterization.

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