Coupling thermoelectrics (TE) with photovoltaics (PV) has emerged as an approach to solid-state solar harvesting, directly converting light and infrared heat into electricity. In this work, we compare PV-TE hybrid devices based on organic semiconductors in three different geometries: a reflection geometry, a non-contact transmission geometry, and a contact transmission geometry. The temperature rises of films of common organic thermoelectric materials, including poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), single-walled carbon nanotubes (swCNT), and poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT), were measured in configurations representative of the proposed geometries. Because organic semiconductors possess broadband light absorption and low thermal conductivities, a significant rise in temperature was observed under illumination for all geometries. We find, however, that the best configuration is, in fact, the transmission contact mode because it sums two effects. Operating under 1 sun illumination, the temperature of a commercial organic PV module increased by ≈30 K, which leads to an enhancement in OPV performance compared to room temperature. After attaching a thermoelectric to the OPV module, losses from convection are reduced, and the OPV module heats up even more, further increasing its efficiency while additionally enabling thermoelectric generation. Finally, we calculate theoretical thermoelectric efficiencies for the materials and their respective power densities.

中文翻译：

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比较基于有机物的光伏-热电混合设备的不同几何形状

将热电（TE）与光伏（PV）耦合已成为一种固态太阳能收集方法，可将光和红外热直接转化为电能。在这项工作中，我们在三种不同的几何结构中比较了基于有机半导体的PV-TE混合器件：反射几何结构，非接触传输几何结构和接触传输几何结构。常见有机热电材料薄膜的温度升高，包括聚（3,4-乙撑二氧噻吩）聚苯乙烯磺酸盐（PEDOT：PSS），单壁碳纳米管（swCNT）和聚[2,5-双（3-十四烷基噻吩） 2-yl）thieno [3,2- b[噻吩]（PBTTT）是在代表所提议几何形状的构型中测量的。由于有机半导体具有宽带光吸收和低热导率的特点，因此在所有几何形状的照明条件下，观察到的温度都会明显升高。但是，我们发现，最佳配置实际上是传输接触模式，因为它会综合两个作用。在1个阳光照射下运行，商用有机PV组件的温度增加了≈30 K，与室温相比，其OPV性能得到了提高。将热电连接到OPV模块后，对流损失会减少，并且OPV模块会进一步发热，从而进一步提高其效率，同时还可以进行热电发电。最后，