CdTe/CdS SOLAR CELL PERFORMANCE UNDER LOW IRRADIANCE
CdTe/CdS SOLAR CELL PERFORMANCE UNDER LOW IRRADIANCE
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发表时间：
2001
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通讯作者：
D. Bätzner;A. Romeo;H. Zogg;A. Tiwari
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作者：
D. Bätzner;A. Romeo;H. Zogg;A. Tiwari
太阳能电池通常在标准测试条件（STC）下表征，其不类似于实际操作条件，特别是对于室内应用，其中电池在比室外应用低得多的辐照度下操作。研究了我们实验室开发的CdTe/CdS太阳能电池在室内低辐照应用中的潜力，并与传统的电池材料如c-Si和GaAs进行了比较。将IV特性的参数归一化为STC值以进行比较分析。CdTe/CdS电池在低强度下显示出比c-Si和GaAs电池优越的上级相对效率和电压。STC效率约为11%的CdTe/CdS太阳电池在1 W/m2时保持约8%的效率，在相同条件下Voc保持高达600 mV。与低成本生产一起，这些CdTe/CdS电池对于室内应用的适用性是先决条件，特别是对于需要高电压的应用。这项研究提供了一个洞察不同的太阳能电池材料的辐照度依赖性的性能，以及通过分析潜在的传输现象所观察到的依赖关系的解释。因此，辐照度的变化几乎超过5个数量级。
Solar cells are usually characterised under standard test conditions (STC), which do not resemble realistic operation conditions, especially for indoor applications where the cells operate at much lower irradiances than for out- door applications. The potential of CdTe/CdS solar cells developed in our laboratory for low irradiance applications typ- ical of indoor use is investigated and compared to conventional cell materials like c-Si and GaAs. Parameters of the IV-characteristics are normalized to the STC values for comparative analysis. The CdTe/CdS cells show a superior rela- tive efficiency and voltage at low intensities than the c-Si and GaAs cells. The CdTe/CdS solar cells with STC efficien- cies of around 11 % retain around 8 % efficiency at 1 W/m 2 and the Voc remains as high as 600 mV under the same conditions. Together with a low cost production the suitability of these CdTe/CdS cells for indoor application is preemi- nent, especially for applications requiring high voltages. This study gives an insight on the irradiance dependent performance of different solar cell materials, as well as explana- tions of the observed dependencies by analysing the underlying transport phenomena. Therefore irradiance was varied over almost 5 orders of magnitude.