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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳學禮(Hsuen-Li Chen) | |
dc.contributor.author | De-Chen Tseng | en |
dc.contributor.author | 曾德宸 | zh_TW |
dc.date.accessioned | 2021-06-17T00:54:41Z | - |
dc.date.available | 2013-10-21 | |
dc.date.copyright | 2011-10-21 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-09-29 | |
dc.identifier.citation | 參考文獻
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66740 | - |
dc.description.abstract | 薄膜太陽能電池相對於傳統單晶矽太陽能電池具有節省材料、可製作於可撓曲基板和可調變吸收波段等優勢,近年來被廣泛的研究與討論,但受限於較低的載子遷移率與吸收光徑的不足,其效率仍有很大的進步空間,如何能降低薄膜厚度並有效地增加吸收光徑成為改善薄膜太陽能電池效率的關鍵之一。
本論文中,主要將結構設計在封裝層上,此設計能夠避免結構對於元件電性的影響,以及避免結構的尺寸受到薄膜厚度的限制而無法最佳化,結構的設計分為非週期性的粒子散射以及週期性的光柵繞射,研究結果顯示,粒子的折射率越大,尺寸越大,將具有較佳的散射效果,我們將介電粒子旋鍍在元件封裝層外,直徑為722nm的聚苯乙烯粒子相較於直徑為1160nm、676nm以及462nm的二氧化矽粒子有較佳的散射能力,可使元件效率有5.2%的增益,若在粒子表面濺鍍上一層高折射率的二氧化鈦薄膜,將具有更優異的散射效果,元件效率增加更為巨大。此外,若結構尺寸遠大於波長,其行為將由幾何光學來探討,我們利用奈米壓印技術在PC板上製作出微米等級倒金字塔結構,此結構除了有良好的抗反射能力外,100%的光會因反射與折射而偏折,其霧度可達到92%以上,將其應用在元件上可使效率由2.80%上升至3.04%,其電流密度的增益更達到15%。而相較於利用介電粒子的散射,週期性光柵的繞射能產生較大角度的繞射光,在週期小於波長的情況下,一階繞射的角度將能超過空氣與光柵介面的臨界角,而使光被侷限在主動層中,我們最佳化的結構為週期600nm深度900nm的三角形PDMS光柵上披覆上250nm高折射率的二氧化鈦,此結構因漸變折射率而具有良好的抗反射效果,且能使一階繞射效率提升至76%,根據理論計算,在吸收不足的近紅外光波段,主動層的吸收增益能達到106%。 | zh_TW |
dc.description.abstract | Thin film solar cells are widely studied and discussed because of their several advatages, such as low cost of materials, flexibility and tunable absorption band. However, the performance of thin film solar cells is limited by poor carrier mobility and insufficient absorption. Therefore one of the most important issues is increasing the effective absorption length and decreasing the thickness of thin film solar cells.
In this study, the harvest enhancement structures wewe designed on encapsulated layers of thin film solar cells. This design can avoid damaging the electronic properties of devices. Futhermore, the size of the structures would not be limited by the thickness of active layer. The light harvest enhancement structures are classified into two types of scattering by dielectric particles and diffraction gratings. This study reveals that the dielectric particles with larger refractive index and size possess better scattering effects. In the experiment, several kinds of dielectric particles are spun on an encapsulated layer. The polystyrene (PS) particles have better scattering ability than the SiO2 particles. The efficiency of solar cells was increased from 2.12% to 2.23% and reached the enhancement of 5.2% by coating the PS particles with a diameter of 722nm. Moreover, adding a high refractive index of TiO2 layer on the textured structures, the scattering ability increased and caused the efficiency increasing larger. Besides, we fabricated inverted pyramidial structures on a Polycarbonate (PC) substrate by the nanoimprint technique. The size of the inverted pyramidial structure is far more than the wavelength of incident light, so the behavior of light will be pridicted by geometric optics. The inverted pyramidial structure which possesses the ability of antireflection and 92% haze will increase the efficiency from 2.80% to 3.04% and the enhancement of current density reach 15%. Comparing to the scattering by nanoparticles, diffraction grating could lead to a large diffractive angle. When the period is smaller than the wavelength of incident light, the first-order diffractive angle will exceed the critical angle between air and the grating. And the light will be trapped in the active layer of a solar cell. The optimal structure is the triangle grating of polydimethylsiloxane (PDMS) which is coated by a high refractive index layer. Because this structure possesses excellent properties of antireflection and high diffraction efficiency, the absorption enhancement of an active layer will reach 106% at the wavelength of 700nm. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T00:54:41Z (GMT). No. of bitstreams: 1 ntu-100-R98527060-1.pdf: 8826632 bytes, checksum: a15a04995ffd43faa887e3688fcf88bb (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | 目錄
誌謝 I 摘要 I ABSTRACT IV 目錄 VI 表目錄 IX 圖目錄 X 第一章 緒論 1 1.1 前言 1 1.2 論文架構 2 第二章 文獻回顧與理論基礎 4 2.1 薄膜太陽能電池 4 2.1.1 薄膜太陽能電池發展歷史 4 2.1.2 薄膜太陽能電池的光學最佳化結構 6 2.2 散射理論 13 2.3 繞射光柵理論 15 2.3.1 光柵分類與理論計算 15 2.3.2 相位光罩原理與設計 16 2.2.3 相位光罩之應用 18 2.4 先進奈米結構製作技術 21 2.4.1 軟性微影技術(soft lithography) 21 2.4.2 奈米壓印技術(nanoimprint) 25 2.4.3 自我複製技術(autocloning technique ) 26 2.5 P3HT:PCBM光學特性 28 第三章 微奈米粒子在封裝層上之散射對元件之增益 29 3.1 研究動機與目的 29 3.2 研究與實驗方法 32 3.2.1 有限時域差分法與光學模擬架構 32 3.2.2 實驗用材料與設備 36 3.2.3 實驗步驟 38 3.3 模擬與實驗結果討論 41 3.3.1 金屬與介電粒子散射效果比較 41 3.3.2 介電粒子大小與形狀之散射效果比較 45 3.3.3 微米等級金字塔結構之散射效果 52 3.3.4 實驗結果與討論 54 第四章 週期性光柵繞射在元件上之增益 69 4.1 研究動機與目的: 69 4.2 研究與實驗方法: 72 4.2.1 嚴格耦合波理論與光學模擬架構 72 4.2.2 實驗用材料與設備 77 4.2.3 實驗步驟 78 4.3 模擬與實驗結果討論 81 4.3.1 利用相位光罩原理設計繞射結構 81 4.3.2 光柵高度與週期對光捕捉效應的影響 86 4.3.3 光柵材料改變對繞射效率的影響 94 4.3.4 實驗結果與討論 104 第五章 結論與未來展望 117 5.1 結論 117 5.2 未來展望 118 參考文獻 119 | |
dc.language.iso | zh-TW | |
dc.title | 應用先進微奈米製程技術於薄膜太陽能電池封裝層以增加元件效率之研究 | zh_TW |
dc.title | The application of advanced nano and micro fabrication techniques on encapsulated layers to enhance the efficiency of thin film solar cells | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 陳俊維(Chun-Wei Chen),王子建(Tzyy-Jiann Wang),林俊宏 | |
dc.subject.keyword | 薄膜太陽能電池,光收成增益結構,粒子散射,繞射光柵,奈米壓印技術,軟性微影技術,自我複製技術, | zh_TW |
dc.subject.keyword | thin film solar cells,light harvest enhanced structures,scattering by nanoparticles,diffraction grating,nanoimprint,soft lithography,autocloning technique, | en |
dc.relation.page | 123 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2011-09-30 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
顯示於系所單位: | 材料科學與工程學系 |
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