外文翻譯-低成本太陽能電池金屬雜質(zhì)的納米級(jí)缺陷工程

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隨著高品質(zhì)的太陽能電池原料的供不應(yīng)求和驅(qū)動(dòng)器的價(jià)格不斷上升，發(fā)展更為便宜的替代原料是一種必然趨勢[1-3]。那么我們該如何成功的利用這些替代原料并嚴(yán)格要求控制金屬雜質(zhì)的有害影響呢。在這項(xiàng)研究中，我們將演示金屬納米級(jí)缺陷工程將如何用于減少金屬雜質(zhì)的電活動(dòng)，使得嚴(yán)重污染的太陽能電池材料性能能夠得到顯著的增強(qiáng)[4-5]。基于同步加速器測量的高靈敏性，可直接確認(rèn)金屬納米級(jí)缺陷的尺寸和空間分布，金屬雜質(zhì)納米級(jí)缺陷的分布調(diào)節(jié)是一種可控的方式。少數(shù)載流子擴(kuò)散長度是確定太陽能電池設(shè)備的實(shí)際性能的關(guān)鍵參數(shù)，少數(shù)載流子擴(kuò)散長度可以通過四個(gè)因素增加。這表明使用低質(zhì)量的原料通過適當(dāng)?shù)目刂瓶赡苁且粋€(gè)增加太陽能電池生產(chǎn)成本效益的辦法。

A
s the demand for high-quality solar-cell feedstock
exceeds supply and drives prices upwards cheaper
but dirtier alternative feedstock materials are being
developed 1–3 . Successful use of these alternative feedstocks
requires that one rigorously control the deleterious effects
of the more abundant metallic impurities. In this study
we demonstrate how metal nanodefect engineering can be
used to reduce the electrical activity of metallic impurities
resulting in dramatic enhancements of performance even
in heavily contaminated solar-cell material. Highly sensitive
synchrotron-based measurements 45 directly confirm that the
spatial and size distributions of metal nanodefects regulate
the minority-carrier diffusion length a key parameter for
determining the actual performance of solar-cell devices. By
engineering the distributions of metal-impurity nanodefects in
a controlled fashion the minority-carrier diffusion length can
be increased by up to a factor of four indicating that the use of
lower-quality feedstocks with proper controls may be a viable
alternative to producing cost-effective solar cells