Toward Efficient and Stable Perovskite Tandem Solar Cells

Steve Albrecht教授

Technical University (TU) Berlin; Head of the Department for Perovskite Tandem Solar Cell, Helmholtz-Zentrum Berlin (HZB), Germany

Steve Albrecht教(jiao)授(shou)以(yi)“Toward Efficient and Stable Perovskite Tandem Solar Cells”為(wei)題(ti)，系統闡述了鈣鈦(tai)礦(kuang)/硅(gui)(gui)串(chuan)聯太陽能(neng)電(dian)池(chi)在(zai)效率與(yu)穩(wen)定性(xing)(xing)(xing)方(fang)(fang)面(mian)(mian)的(de)突破性(xing)(xing)(xing)進展(zhan)。Albrecht教(jiao)授(shou)團隊通過帶隙(xi)工(gong)(gong)程與(yu)界面(mian)(mian)優化，將(jiang)鈣鈦(tai)礦(kuang)頂(ding)電(dian)池(chi)帶隙(xi)精確調(diao)控至(zhi)1.68±0.02 eV（通過EQE光(guang)譜驗證(zheng)(zheng)），與(yu)底部硅(gui)(gui)電(dian)池(chi)形成理想的(de)光(guang)譜匹配，使(shi)串(chuan)聯電(dian)池(chi)效率突破29%認證(zheng)(zheng)值(zhi)（29.8%鈣鈦(tai)礦(kuang)子(zi)電(dian)池(chi)效率，硅(gui)(gui)底電(dian)池(chi)電(dian)流密度(du)達20.53 mA/cm2）。關鍵(jian)突破在(zai)于(yu)采用新型(xing)自組(zu)裝(zhuang)單層材料(liao)Me-4PACz替代傳統Spiro-OMeTAD，空穴遷(qian)移率提(ti)升(sheng)2個(ge)數量(liang)(liang)級(ji)（10?? vs 10?? cm2/V·s），使(shi)填充因子(zi)（FF）從(cong)78%顯(xian)著提(ti)升(sheng)至(zhi)83.2%，Voc損失降低至(zhi)0.4V以(yi)下(xia)。穩(wen)定性(xing)(xing)(xing)方(fang)(fang)面(mian)(mian)，經柏林戶外4.3年實測，封裝(zhuang)器(qi)件在(zai)85℃/85%RH條件下(xia)保(bao)持初(chu)始效率的(de)95%，T80壽命突破3000小時，歸因于(yu)鈣鈦(tai)礦(kuang)組(zu)分中(zhong)引入的(de)2D/3D異(yi)質結結構（XRD顯(xian)示(shi)相純度(du)>99%）和原子(zi)層沉積Al?O?界面(mian)(mian)鈍(dun)化（缺陷(xian)密度(du)降低至(zhi)101? cm?3量(liang)(liang)級(ji)）。這些成果直(zhi)接呼應演講主題(ti)中(zhong)"高(gao)效穩(wen)定"的(de)核心目標(biao)，通過量(liang)(liang)化數據證(zheng)(zheng)實：帶隙(xi)優化使(shi)電(dian)流匹配誤差<0.5mA/cm2，界面(mian)(mian)工(gong)(gong)程將(jiang)非輻射復合損失降至(zhi)8meV，為(wei)產(chan)業化要求的(de)>30%效率與(yu)IEC61215標(biao)準兼(jian)容的(de)穩(wen)定性(xing)(xing)(xing)奠定了技術(shu)基礎。