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【敏感词】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【敏感词】trading company

• final inspection before installation

• documentation purposes

• acceptance tests

system's benefits

• no need to demount the solar module (save time/cost)

• direct outdoor measurements possible

• excellent sensitivity【敏感词】image quality

• quick measurements (~2sec for c-si solar modules)

• no dark box【敏感词】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【敏感词】the solar

module being measured. it is possible to apply up to 100v【敏感词】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【敏感词】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: