Limiting loss mechanisms in 23% efficient silicon solar cells

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作者：

Inst for Solar Energy Research, Emerthal, Germany ^{[1
]}

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来源：

J Appl Phys | / 7卷 / 3491-3504期

关键词：

Computer simulation - Current voltage characteristics - Electric conductivity - Interfaces (materials) - Losses - Passivation - Quantum efficiency - Reflection - Silica - Silicon - Surface properties;

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摘要：

The paper presents a detailed investigation of the limiting loss mechanisms in University of New South Wales (UNSW) 'passivated emitter and rear locally diffused' (PERL) silicon solar cells with independently confirmed air mass 1.5 global (AM1.5G) efficiencies of up to 23.0%. The ohmic losses in cells, not only depends on the operating mode of the cell, but also on the current density flowing through the device the study shows that the efficiency of 23% PERL cells could be augmented by about 0.7% absolute if ohmic losses were eliminated, a further 1.1% absolute if there were no reflection losses at the nonmetallized front surface, about 2.0% by introducing ideal light trapping and eliminating shading losses due to the front metallization, and by about 3.7% absolute if the device had no defect-related recombination losses.

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