CAJ | 학술논문

为了提高量子点敏化纳晶薄膜太阳能电池的光电转换效率，我们通过连续在酸和多硫溶液中处理铅片制备了对多硫电解液具有高电催化活性的硫化铅电极。通过电化学阻抗谱测试评价所制备硫化铅电极的催化活性，从而确定制备高效硫化铅电极的最佳条件。以在最佳条件下制备的硫化铅为对电极、CdSe量子点敏化TiO2纳晶薄膜为工作电极和多硫电解液组装成量子点敏化太阳能电池。光电性能测试结果表明所制备的电极具有良好的催化活性和光电转换性能。与已报导的方法相比，新方法大幅度地减少制备过程所需的时间，但却提高了所制备的硫化铅对电极的催化活性。通过X射线衍射和扫描电镜测试表征了硫化铅的生成过程，探讨了催化活性提高的原因。
위료제고양자점민화납정박막태양능전지적광전전환효솔，아문통과련속재산화다류용액중처리연편제비료대다류전해액구유고전최화활성적류화연전겁。통과전화학조항보측시평개소제비류화연전겁적최화활성，종이학정제비고효류화연전겁적최가조건。이재최가조건하제비적류화연위대전겁、CdSe양자점민화TiO2납정박막위공작전겁화다류전해액조장성양자점민화태양능전지。광전성능측시결과표명소제비적전겁구유량호적최화활성화광전전환성능。여이보도적방법상비，신방법대폭도지감소제비과정소수적시간，단각제고료소제비적류화연대전겁적최화활성。통과X사선연사화소묘전경측시표정료류화연적생성과정，탐토료최화활성제고적원인。
To improve the light-to-electric conversion efficiency of quantum dots-sensitized nanocrystal ine thin-film solar cells, a PbS electrode with high electrocatalytic activity toward polysulfide electrolyte was prepared by successively treating Pb foil in acid and polysulfide solutions. Electrochemical impedance spectroscopy (EIS) measurements were performed to evaluate the electrocatalytic activity of the prepared PbS electrode. Based on the EIS results, the temperature and time to treat the Pb foil in the acid solution were optimized. The PbS electrode prepared under the optimized conditions was used as a counter electrode to fabricate a quantum dots-sensitized solar cellwith a CdSe quantum dots-sensitized TiO2 nanocrystal ine thin film as the photoanode and polysulfide solution as the electrolyte. Both the electrocatalytic activity and light-to-electric conversion properties of the PbS electrode prepared from acid treatment of Pb foil for the optimized temperature and time are superior to those of electrodes prepared by other reported methods. In our method, the treatment time is considerably less but the PbS counter electrode maintains a superior catalytic activity compared with other methods. X-ray diffraction and scanning electron microscopy were performed to demonstrate the formation process of PbS, and the catalytic enhancement mechanism of the prepared PbS electrode is discussed.