电致发光，又称场致发光，英文名为Electroluminescence，简称EL。电致发光依靠从扩散区注入的大量非平衡载流子不断地复合发光，放出光子；再利用CCD相机捕捉到这些光子，通过计算机目前，电致发光成像技术已被很多太阳能
电池和组件厂家使用，用于检测产品的潜在缺陷，控制产品质量。而便携式EL设备由于其方便携带，可用于户外EL测试，对光伏系统进行检测和诊断，不断受到光伏业内的人士的关注。
Inspection Capabilities
• Micro-Crack Identification
• Shunt Detection
• Potential Induced Degradation (PID)
• Finger Defects
• Dead Cells
• Broken Cells
• Hotspots (partially)
• Inhomogeneities and Impurities
Areas of Application
• Direct Inspection of Solar Modules at the PV Power Plant
• Inspection of Rooftop PV Installations
• Incoming Goods Inspection
• Failure Analysis of the PV Power Plant
• Pre-delivery Inspection at the Manufacturer or Trading Company
• Final Inspection before Installation
• Documentation Purposes
• Acceptance Tests
Systems Benefits
• No need to demount the Solar Module (save time/cost)
• Direct outdoor Measurements possible
• Excellent Sensitivity and Image Quality
• Quick Measurements (~2sec for c-Si Solar Modules)
• No dark Box or Cover needed
• Mobile Solution, no Transport Vehicles needed
• Battery based System allows independent Operation
Successfully tested on various Solar Cell/ Module Types
• Monocrystalline Silicon (mono-Si)
• Polycrystalline Silicon (poly-Si)
• Amorphous Silicon (a-Si)
• Copper Indium Sulfide (CIS)
• Copper Indium Gallium Selenide (CIGS)
• Cadmium Telluride (CdTe)
• Heterojunction with Intrinsic Thin Layer (HIT)
Battery-powered LumiSolarOutdoor System
The battery based version of the LumiSolarOutdoor system does not need any external power source. A powerful battery generates the electricity for both, camera and the solar
module being measured. It is possible to apply up to 100V and 7.5A to the module.
Specifications
Application Electroluminescence Inspection of Single Modules
directly on-site
EL Images 1024 × 1024 Pixel, 16 bit
Resolution 1.5mm/Pixel for Modules sized 1.7m × 1m
Image Output Data BMP, JPEG, raw data or TXT file
Measurement time ~2 sec for c-Si Solar Modules
Min. Distance Camera ↔ Module 0.25m
Typ. Distance Camera ↔ Module 3M-5m
Outdoor light conditions night sky, late twilight time
Module Power Supply from Battery max. 100V / 7.5A / 750W
Number of Measurements with single battery
charge
200-500 modules. Independent of the battery, the
system can be powered separately through a standard
100-240V~ socket
Dimensions of Trolley (Wheels included),
height × width × depth 75cm × 57cm × 38cm
Total System Weight 37kg
Schematic measurement set-up:
