Long-lived hot-carrier light emission and large blue shift in formamidinium tin triiodide perovskites.
Long-lived hot-carrier light emission and large blue shift in formamidinium tin triiodide perovskites.
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DOI：
10.1038/s41467-017-02684-w
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发表时间：
2018-01-16
影响因子：
16.6
通讯作者：
Loi MA
中科院分区：
文献类型：
--
作者：
Fang HH;Adjokatse S;Shao S;Even J;Loi MA
为了开发效率超过肖克利-奎塞尔极限的工作热载流子光伏器件，长寿命的热载流子群体至关重要。在这里，我们报道了三碘化甲脒锡中热载流子的光致发光，其寿命出人意料地长（几纳秒）。随着激发功率的增加（24K 时为 150meV，293K 时为 75meV），时间积分光致发光出现异常大的蓝移。在能量分辨和时间分辨光致发光分析的基础上，我们假设这些现象与缓慢的热载流子弛豫和能带边缘态的状态填充有关。这些观察结果对于我们了解无铅混合钙钛矿以及未来高效无铅钙钛矿光伏电池的最终发展都很重要。热载流子具有多余的能量，如果它们的寿命足够长，可以用来提高太阳能电池的效率。在这里，方等人。通过光致发光观察三碘化甲脒锡钙钛矿的纳秒热载流子寿命，该寿命比铅基钙钛矿高 1000 倍。
A long-lived hot carrier population is critical in order to develop working hot carrier photovoltaic devices with efficiencies exceeding the Shockley–Queisser limit. Here, we report photoluminescence from hot-carriers with unexpectedly long lifetime (a few ns) in formamidinium tin triiodide. An unusual large blue shift of the time-integrated photoluminescence with increasing excitation power (150 meV at 24 K and 75 meV at 293 K) is displayed. On the basis of the analysis of energy-resolved and time-resolved photoluminescence, we posit that these phenomena are associated with slow hot carrier relaxation and state-filling of band edge states. These observations are both important for our understanding of lead-free hybrid perovskites and for an eventual future development of efficient lead-free perovskite photovoltaics. Hot carriers have excess energy that could be used to enhance solar cell efficiencies if their lifetimes are sufficiently long. Here, Fang et al. observe nanosecond hot carrier lifetime by photoluminescence in formamidinium tin triiodide perovskites which is 1000 times higher than lead based perovskites.
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影响因子：
4.6
作者：
Bokdam M;Sander T;Stroppa A;Picozzi S;Sarma DD;Franchini C;Kresse G
通讯作者：
Kresse G
DOI：
10.1073/pnas.1609030113
发表时间：
2016-08-09
影响因子：
11.1
作者：
Kong, Lingping;Liu, Gang;Mao, Ho-kwang
通讯作者：
Mao, Ho-kwang
影响因子：
1.6
作者：
Do Kim, Hyung;Miyamoto, Yoshihiro;Ohkita, Hideo
通讯作者：
Ohkita, Hideo
影响因子：
4
作者：
Jang, DJ;Olesberg, JT;Hasenberg, TC
通讯作者：
Hasenberg, TC
影响因子：
5.7
作者：
Etienne, Thibaud;Mosconi, Edoardo;De Angelis, Filippo
通讯作者：
De Angelis, Filippo